Double Drawn and End Fullness Explained: How Hair Extension Fullness Is Actually Measured

Double Drawn is commonly used to describe hair with a fuller length profile. However, there is no universal industry percentage that automatically makes one product Double Drawn and another Super Double Drawn.

Prime Human Hair uses Double Drawn as a production concept describing a product in which a high proportion of the hair reaches or approaches the target length, substantially shorter hairs are reduced, and the finished ends remain fuller than a standard mixed-length bundle.

One production example for a 10-inch Double Drawn specification could be approximately 85% of the hair at 10–12 inches and approximately 15% at 8–9 inches.

This is an example of a possible production composition, not a universal fixed formula for every Prime Human Hair product. The exact distribution can vary with target length, hair quality, colour, product system and the agreed fullness requirement.

A professional quotation should define the intended result rather than rely only on the words Double Drawn.

End Fullness describes how full the hair remains near the lower part of the finished product. It is often expressed as a percentage, but the percentage alone is not enough. A buyer should always ask how that percentage is being measured.

The hair industry does not use one universal method. Two common approaches are the weight-ratio method and the circumference-ratio method.

In the weight-ratio method, the percentage refers to the amount of long hair near the target length relative to the total hair weight.

For a 20-inch product specified at 35% End Fullness by weight, one possible definition is: the weight of hair measuring 19 inches or longer divided by the total net human-hair weight equals 35%.

This method focuses on how much of the product's weight is concentrated near the target length.

In the circumference-ratio method, fullness is evaluated by comparing the circumference near the lower part of the hair with the circumference near the upper part.

For a 20-inch product specified at 35% End Fullness by circumference, one possible production definition is: circumference at approximately the 19-inch position divided by circumference at approximately the 3-inch position from the top equals 35%.

This method focuses on the visible thickness profile from top to end. It is one measurement method, not the only definition of End Fullness.

One supplier may define 35% by weight while another defines it by circumference. Those are not the same measurement. Even if both quotations say 35% End Fullness, the products may not be directly comparable.

Prime Human Hair recommends confirming the measurement method, target length, reference point and agreed finished appearance before approving the specification.

No. They are related, but they are not the same concept. Double Drawn describes the overall length distribution and reduction of substantially shorter hairs. End Fullness gives a more measurable way to describe how much hair remains near the ends.

A buyer can therefore request Double Drawn plus 35% End Fullness or Double Drawn plus 50% End Fullness as two different specifications.

Not necessarily. Higher fullness generally means more long hair is required to remain near the target length. That usually increases raw-material requirements and manufacturing cost.

The right fullness depends on the salon's target client, intended finished look, extension method, length, colour and brand price position. A fine-hair client may not need the same fullness profile as a luxury-volume installation. The goal is the correct specification, not simply the highest number.

Long, light-coloured hair creates two simultaneous demands: more hair must reach the target length, and that long hair must also survive additional colour processing.

Achieving a high End Fullness target on a 24–30-inch very light blonde product generally requires more selective starting material than producing a shorter dark product. Price comparisons should consider length, colour, hair grade, End Fullness and processing level together.

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Super Double Drawn sounds precise, but it is not a universal technical standard. One factory may use the term for a very full product, while another may use it for a moderate improvement over its own standard Double Drawn grade.

Without a measurable specification, the words alone do not tell the buyer enough. A more useful request is: Please quote Double Drawn with the agreed End Fullness measured by the specified method.

Prime Human Hair treats fullness as part of the written product specification. Depending on the project, the buyer can define target length, Double Drawn requirement, End Fullness percentage, weight-ratio or circumference-ratio method, net human-hair weight and approved physical sample.

Once the sample is approved, the physical sample and written specification become the reference for bulk and repeat production. This does not mean every natural hair bundle will be microscopically identical. It means the buyer and manufacturer have agreed on the same measurement language.

Apply the measurements to a manufacturing specification

At Prime Human Hair, 100 g refers to net human-hair weight. Thread, tape, keratin, clips and other non-hair attachment materials are not included in the stated hair weight.

This matters particularly when using a weight-ratio End Fullness method because the calculation should be based on hair rather than non-hair attachment components.

Instead of writing only 22-inch, Double Drawn, use a fuller specification such as: Product: Genius Weft; Length: 22 inches; Net human-hair weight: 100 g; Hair grade: Fully Cuticle-Intact Remy; Double Drawn: Yes; End Fullness: 50%; Measurement: circumference ratio; Colour: approved reference.

This gives the supplier a clearer target and makes quotations from different suppliers easier to compare.

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