100g vs 120g Hair Bundles: Which Should Salons Buy?

The question 100g vs 120g hair extensions matters because a product choice affects much more than the look of one sample. It changes consultation, installation, inventory, client expectations, quality control and the cost of correcting a mismatch.

A 120g bundle contains 20% more gross weight than a 100g bundle only when both are measured on the same basis. It is not automatically fuller at the ends or better for every client. Compare net product weight, length, drawn level, track weight and service requirements.

This guide is written for professional buyers. It does not treat marketing names as universal standards, and it does not promise identical performance from every lot. Use the framework below to approve the exact product you plan to sell or install.

Quick comparison

Decision point	Option or condition A	Option or condition B
Gross stated weight	100g	120g
Potential coverage	Lower	Higher
Client comfort	May suit lighter services	May suit fuller services if placement is appropriate
Inventory cost	Lower per unit	Higher per unit
Key control	Net usable hair and end profile	Net usable hair and end profile

What the label does not prove

The commercial label is only the beginning of the specification. It does not confirm origin, donor count, cuticle direction, previous chemical work, color tolerance or a fixed service life.

For a fair comparison, keep the following variables constant wherever they apply:

• product format and attachment system;
• stated length and measuring method;
• net weight or piece count;
• color and undertone;
• drawn level and lower-quarter fullness;
• washing, drying and photography conditions;
• production lot and supplier specification.

If two samples differ on several variables at once, the comparison may produce a confident answer to the wrong question.

A practical evaluation framework

1. Confirm what the scale includes

Ask whether the stated number includes the track, ties, clips or packaging. Weigh unopened and unpacked units according to a documented method.

For wholesale approval, turn this point into a written field on the sample scorecard. Record the method, the result and the person who checked it so the production lot can be evaluated in the same way.

2. Do not confuse weight with drawn level

A 120g single-drawn unit can have less bottom fullness than a 100g fuller-drawn unit. Inspect the lower quarter and calculate usable yield.

This is also a client-expectation issue. Sales, installation and support teams should use the same description; otherwise a technically acceptable product can still create a preventable complaint.

3. Match weight to service design

Head size, natural-hair density, installation method, length and desired result all affect the required amount. Avoid treating one unit weight as a full-head promise.

Compare at least one retained reference and one current-lot unit under the same conditions. If the difference is visible but still acceptable, document the tolerance before the order is released.

4. Compare client price fairly

Use landed cost per usable gram and expected units per service. Include labor and unused remnants when setting the service price.

The commercial question is not whether the sample looks attractive for a few minutes. It is whether the result is repeatable, serviceable and appropriate for the promised price tier.

5. Plan inventory by combinations

A salon may carry 100g in core lengths and 120g in selected high-volume or long-length SKUs. Let booked demand decide.

Keep this decision separate from unrelated claims such as origin, donor count or raw status. Each claim needs its own evidence and acceptance rule.

6. Set weight tolerances

Agree on an acceptable tolerance and sampling method in the purchase order. Record the scale model and calibration checks for disputes.

For wholesale approval, turn this point into a written field on the sample scorecard. Record the method, the result and the person who checked it so the production lot can be evaluated in the same way.

Understanding every decision point

A long-form comparison is useful only when it changes the quality of a decision. The five points below translate the headline topic into observable differences, client outcomes and purchasing controls. They should be adapted to the exact format, length, color and construction under review.

Gross stated weight

Read gross stated weight from the client’s finished look backward. If the desired outcome depends on 100g, identify the products, tools and skill needed to preserve it. If 120g is the more suitable condition, explain why it fits the service rather than presenting it as a compromise. Trial both routes on labeled material and record preparation minutes, finishing steps and the result after rest. This makes the comparison useful for quotation and scheduling as well as purchasing. The team can then decide whether the options need separate pricing, separate aftercare or separate stock codes. A distinction that is not carried into operations is likely to disappear when employees are busy.

Potential coverage

Examine potential coverage across the whole unit rather than choosing one flattering section. Look for lower at the roots or attachment, through the mids and at the ends, then note where higher appears. Some differences are uniform; others are concentrated in one zone and create a different service risk. Photograph all relevant zones with the label visible. For a trial lot, count the number of units inside and outside the accepted range. This distribution tells purchasing whether the issue is a predictable specification, a small amount of natural variation or inconsistent production that cannot be priced confidently.

Client comfort

Make client comfort part of the sample briefing before the supplier selects material. Describe the wanted condition as may suit lighter services and identify may suit fuller services if placement is appropriate as the comparison, alternative or limitation. Ask the supplier to confirm which part of the result is controlled in production and which part can vary. When the samples arrive, review them without supplier commentary first, then compare your notes with the supplier’s explanation. This order helps the buyer observe rather than search only for confirmation. Any accepted variation should be written in language that can be checked again; a private understanding between two salespeople is not enough for receiving staff.

Inventory cost

Consider how inventory cost changes through transport and storage. A unit expected to show lower per unit may be compressed, folded or temporarily shaped in packaging; a unit described as higher per unit may need conditioning before a fair evaluation. Record the arrival state, then follow the approved conditioning method and record the stable state. Do not silently “fix” every sample before documenting it, because the preparation time and skill are part of landed performance. If packaging is the main cause, the commercial solution may be a packing change rather than a different fiber. Separate those causes before rejecting or rebranding the SKU.

Key control

Price the key control difference using a finished-service calculation. Start with material showing net usable hair and end profile and material showing net usable hair and end profile. Add inspection, preparation, installation or production time, consumables, usable yield and expected corrections. The lower unit price is not the lower cost when it repeatedly needs extra labor or creates unsellable remnants. Equally, a premium is not justified when clients do not value the visible result. Run the calculation on the pilot order and review it after actual services. This connects the technical comparison with a margin decision instead of allowing attractive terminology to determine the order.

Standardized test protocol for 100g vs 120g hair extensions

Condition all samples in the same environment and label them before any washing, styling or destructive work. The objective is not to reproduce a laboratory claim; it is to create a controlled business test that trained staff can repeat. Use professional judgment, follow product and equipment instructions, and stop a test that risks unsafe exposure or unnecessary damage.

Step 1: Net versus gross weight

Plan the net versus gross weight observation around the moment the characteristic is most stable. Let packaged material rest or condition it according to the agreed method, then note both the arrival state and the review state. Keep the product label inside the first photograph and use a second image for detail. If handling changes the result, record who performed it and for how long. This prevents the team from comparing one untouched unit with another that has been brushed, stretched, washed or styled. The final decision should state which condition is the official acceptance point for future deliveries.

Step 2: Track weight

Use a calibration exercise for track weight before several people inspect a shipment. Give each reviewer the same three labeled examples and ask for a pass, hold or fail decision. Discuss differences, refine the instruction and repeat until the team applies the boundary consistently. Calibration is especially valuable for visual or tactile characteristics that cannot be reduced to one number. Save the examples or photographs with the date and specification version. When a new employee joins or the supplier changes a process, repeat the exercise rather than assuming the old judgment will transfer automatically.

Step 3: Length

Calculate the business impact attached to length. For a failed unit, record whether the consequence is complete rejection, extra preparation, lower pricing, restricted use or a replacement request. Add the estimated minutes, material loss and support risk. This information helps purchasing rank controls by financial importance and negotiate from evidence. It also prevents the team from spending the same inspection effort on a cosmetic difference and a critical construction failure. Revisit the impact after real sales, because a characteristic that seemed minor during sampling may matter greatly to repeat clients.

Step 4: Drawn level

When the supplier provides evidence for drawn level, verify that it represents the current lot and the same specification. Ask for the label or batch reference in the frame and check whether lighting, moisture, tension or editing could affect interpretation. Compare supplier evidence with your incoming sample rather than treating the two records as alternatives. A difference does not automatically prove fault; it shows where the parties should compare method and condition. Agree which evidence will control future orders, and place that rule in the specification so the discussion is not repeated from the beginning after every shipment.

Step 5: Lower-quarter density

Separate the lower-quarter density method into non-destructive and destructive stages. Complete visual, measured and handling observations first. Only then use the approved sample portion for washing, coloring, heat, cutting, attachment or another irreversible service simulation. Mark altered units clearly and remove them from normal sellable inventory. This sequence preserves evidence when a basic identity or specification problem appears early. It also reduces waste, because the team does not spend a full technical test on material that already fails the product, color, length, weight or construction stated on the order.

Step 6: Units per service

Create an escalation rule for units per service. A receiver may release results comfortably inside tolerance, but a borderline result should go to the technical or purchasing owner before stock is mixed, repacked or customized. State how quickly the decision is needed and what evidence must accompany it. For a large shipment, identify whether the hold applies to one unit, one carton, one specification or the whole lot. Clear scope prevents a minor isolated issue from freezing all inventory, while also preventing widespread variation from being treated as a handful of unrelated exceptions.

Step 7: Landed cost per usable gram

Trend landed cost per usable gram over several orders instead of reading every lot in isolation. Use the same field, method and outcome codes so a spreadsheet can show changes in failure rate, correction time or visual drift. Add notes when the supplier, product process, packaging or internal reviewer changes. A gradual trend may be more commercially important than one dramatic failure, especially when each lot remains barely inside a loose tolerance. Trend data supports a fair supplier review and tells the buyer when the retained reference or product description no longer represents current production.

Three real-world business scenarios

Scenario 1: approving a new supplier or unfamiliar SKU

Start with a matched screening sample for 100g vs 120g hair extensions. Confirm net versus gross weight, track weight and length before the team invests in more advanced work. The technical reviewer then applies the intended service to a sacrificial portion and records preparation time, usable yield and any correction. Purchasing compares the result with the written offer; sales prepares a limited description based only on what the test demonstrated. The first commercial order remains a trial lot, with a predetermined maximum quantity and a review date. Scaling is allowed only when several units reproduce the approved result and the supplier can identify the production lot.

Scenario 2: receiving a repeat order

Do not accept “same as last time” as the only specification. Place the retained reference beside units from the new delivery and verify drawn level, lower-quarter density and units per service. Check packaging and labels before samples are separated from their cartons. If a difference is visible, estimate whether it changes the client promise, service time, sellable yield or price tier. A noncritical variation can be accepted only with a written disposition; a critical identity, construction or performance failure keeps the affected stock on hold. Update the supplier with evidence from the current lot rather than sending an unlabeled image after the products have been mixed or customized.

Scenario 3: investigating a client complaint

First identify the SKU, lot and timeline. Ask what installation, coloring, washing, heat, products, storage and maintenance occurred before the issue appeared. Compare the client unit with unused stock and the retained approval sample when available. Review the original results for gross stated weight and potential coverage instead of assuming that every complaint has the same cause. The resolution may involve product variance, an unsuitable recommendation, service technique, aftercare or several factors together. Preserve respectful, factual communication: document what is known, what remains uncertain and what evidence is needed before changing the supplier specification or client guidance.

Client consultation and order-taking script

The product description should help a buyer choose, not push every client toward the same SKU. Use these prompts during a salon consultation, wholesale quotation or private-label product review:

1. Clarify gross stated weight. Ask whether the client or business needs 100g or 120g. Show the approved reference where possible, explain the maintenance or service consequence, and record the selected outcome on the consultation or order form.
2. Clarify potential coverage. Ask whether the client or business needs lower or higher. Show the approved reference where possible, explain the maintenance or service consequence, and record the selected outcome on the consultation or order form.
3. Clarify client comfort. Ask whether the client or business needs may suit lighter services or may suit fuller services if placement is appropriate. Show the approved reference where possible, explain the maintenance or service consequence, and record the selected outcome on the consultation or order form.
4. Clarify inventory cost. Ask whether the client or business needs lower per unit or higher per unit. Show the approved reference where possible, explain the maintenance or service consequence, and record the selected outcome on the consultation or order form.
5. Clarify key control. Ask whether the client or business needs net usable hair and end profile or net usable hair and end profile. Show the approved reference where possible, explain the maintenance or service consequence, and record the selected outcome on the consultation or order form.

Finish by confirming the exact product, quantity, length, color, texture, construction, desired result, professional service plan and maintenance responsibilities. Avoid promising a fixed lifespan or “zero” tangling, shedding, maintenance or color variation. Human hair performance depends on its condition, production, service and care, while attachment systems also depend on correct installation and client suitability.

Risk register before a larger order

Risk behavior	Likely business consequence	Preventive control
Assuming 120g means fuller ends	Wrong SKU recommendation, preventable return or discounting	Verify net versus gross weight; retain the result and owner
Weighing with packaging	Inconsistent receiving decisions and weak supplier evidence	Verify track weight; retain the result and owner
Promising one bundle per head	Unexpected labor, waste or reduced usable yield	Verify length; retain the result and owner
Ignoring client comfort	A client promise that the tested product cannot support	Verify drawn level; retain the result and owner
Comparing different lengths	Repeat-order drift that is noticed only after stock release	Verify lower-quarter density; retain the result and owner

Review the register after the pilot order and after the first group of client services. Replace assumptions with actual rework, return, waste and sell-through data. The aim is not to eliminate every variation; it is to recognize material variation early, price it correctly and prevent a known limitation from becoming a misleading sales promise.

A 30-day pilot and launch plan

Period	Main action	Release evidence
Days 1–5	Define the intended client, service and price tier; receive and label matched samples	Offer, sample ID, package check and non-destructive observations
Days 6–12	Run the controlled checks, including net versus gross weight, track weight, length	Before-and-after records, method, reviewer and usable-yield notes
Days 13–20	Complete a limited service or production trial with consistent care guidance	Service time, result, corrections and follow-up
Days 21–26	Review cost, variation, feedback and early sell-through	Core, test or special-order decision; approved SKU description
Days 27–30	Agree supplier actions and version the next-order specification	Retained reference, tolerance, owner and reorder decision

Extend the trial when evidence is incomplete, and stop it when a critical specification or safety condition fails.

Buyer inspection checklist

Step	Check	Evidence to retain
1	Net versus gross weight	Record the method, result, lot and reviewer
2	Track weight	Record the method, result, lot and reviewer
3	Length	Record the method, result, lot and reviewer
4	Drawn level	Record the method, result, lot and reviewer
5	Lower-quarter density	Record the method, result, lot and reviewer
6	Units per service	Record the method, result, lot and reviewer
7	Landed cost per usable gram	Record the method, result, lot and reviewer

Complete the checklist before cutting, coloring, installing, repackaging or mixing the unit with other lots. When destructive testing is relevant, use a separate sacrificial sample and a qualified professional.

How to turn a sample into a purchase specification

Translate the accepted sample into fields that another employee can check without guessing. Use numbers for weight and size, named methods for measurement, and reference photographs for appearance. A useful specification normally includes:

1. product type and exact construction;
2. claimed origin and processing description;
3. length, weight or count, and the measuring method;
4. texture, color and acceptable visual tolerance;
5. drawn level or end-fullness reference;
6. packaging, labels and lot identification;
7. inspection method, acceptance rule and complaint evidence;
8. approval sample identifier and date.

Avoid phrases such as “same as before” unless the earlier lot and retained sample are identified. Any substitution of fiber, construction, color or attachment should require written approval.

Inventory and pricing implications

Compare landed cost with usable yield, preparation time, likely corrections and support workload. A lower invoice price can be erased by waste or repeated service problems.

Use a simple stock structure:

• Core SKUs: combinations with repeated paid demand and dependable supply.
• Test SKUs: small quantities with a review date and a defined success measure.
• Special-order SKUs: high-variation or low-frequency items purchased after client confirmation.

Review performance by SKU and lot. Combining every product into one “hair sales” number hides which length, texture, weight, color or construction is actually producing reorders.

Use a three-stage pilot before scaling

Screening sample: verify net versus gross weight and track weight before investing time in styling or destructive tests. Reject identity or specification failures at this stage.

Service simulation: test length, drawn level, lower-quarter density using the actual salon or production workflow. Record time, products, tools and observations.

Trial order: inspect units per service and landed cost per usable gram across several units, not only the best-looking piece. Release the SKU only after the lot matches the approved reference.

A pilot needs a pass rule before the first package is opened. Assign the reviewer, equipment, sampling quantity and storage location for evidence.

Example approval scorecard

Criterion	Suggested weight	Approval basis
Net versus gross weight	20	Approve against the retained sample and written tolerance
Track weight	15	Approve against the retained sample and written tolerance
Length	15	Approve against the retained sample and written tolerance
Drawn level	15	Approve against the retained sample and written tolerance
Lower-quarter density	15	Approve against the retained sample and written tolerance
Units per service	10	Approve against the retained sample and written tolerance
Landed cost per usable gram	10	Approve against the retained sample and written tolerance

The weights below are illustrative. Change them to reflect the real failure cost of this service and make critical defects separate stop conditions.

Use three outcomes:

• Approved: the lot meets all stop conditions and reaches the buyer’s minimum score.
• Conditional hold: evidence is incomplete or a correctable issue needs written agreement.
• Rejected: a stop condition fails, the product cannot support the advertised use, or traceability is missing.

Hand the specification to sales and support

Give sales staff a short approved description covering measurement, finish, maintenance and limits. Remove absolute promises that the evidence cannot support.

Support staff should capture lot, timeline, service method, care history and clear evidence. This separates product variance from storage, processing or installation.

Common mistakes

• Assuming 120g means fuller ends. It removes important context and can turn a manageable difference into a client complaint.
• Weighing with packaging. A written method and retained reference give the team a more reliable basis for action.
• Promising one bundle per head. The result may look acceptable in one photo while failing during service or repeat ordering.
• Ignoring client comfort. This makes landed-cost and supplier comparisons less accurate.
• Comparing different lengths. Separate the variable, test it consistently and record the decision before stock release.

Questions to ask the supplier

• How should a buyer verify net versus gross weight, and what current-lot evidence can you provide?

• What specification or limitation do you use for track weight on this SKU?

• Can you show how length is checked before packing and recorded by lot?

• What change in drawn level would require approval before production or shipment?

• Which sample, measurement or photo should be used to approve lower-quarter density?

• How should a buyer verify units per service, and what current-lot evidence can you provide?

• Can you provide a current-lot photo or video under neutral light?

• Will production be compared with the retained approved sample?

• What happens if a measurable field falls outside the agreed tolerance?

• Which changes require written buyer approval before production?

Final buying recommendation

Choose by client fit and verified production performance, then keep the approved sample as the control for repeat orders. When a claim cannot be measured directly, use retained references, controlled photography and a written tolerance instead of relying on a marketing label.

Anvi Hair buyers can compare current options in the relevant product collection, review the broader Vietnamese hair wholesale guide and contact the team with a written specification and destination.

Frequently asked questions

Is 120g always better than 100g?

No. It offers more gross weight, but client fit, fullness distribution and construction still matter.

Can one 120g bundle complete an install?

It depends on the service, head, length, density and method. Do not make a universal promise.

Why do two 100g bundles look different?

Drawn level, texture, packaging, track construction and moisture can change appearance.

How should salons compare price?

Use landed cost per usable gram and expected cost per finished service.

Does longer hair need more grams?

Often a fuller long result needs more total hair, but decide from the intended density and end profile.

What tolerance should be allowed?

Agree it with the supplier and document the measurement method; do not assume an unstated standard.

Sources and further reading

• https://anvihair.com/product-category/weave-hair/
• https://anvihair.com/vietnamese-hair-extensions-wholesale-the-ultimate-buyer-guide-2025/

Editorial note: Product terminology and supplier specifications can vary. Technical services, chemical processing and attachment decisions should be handled by trained professionals using the product maker’s instructions and a client-specific assessment.

About the author

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