If the cloth has not yet been selected, use the canvas fabric-weight guide to shortlist options around the intended bag. The yarn and thread-density details below then help identify the actual cloth behind each nominal weight.
A fabric quotation says “20 × 20”. Another gives a longer pair of numbers and a weight in g/m². Before deciding which is the closer match, ask what the numbers describe. A yarn-size notation and a count of threads in the cloth are not the same field.
Putting cotton canvas yarn count and thread density into separate, labelled entries gives a tote buyer a better material record. It also stops a familiar-looking number from becoming an accidental approval for a different fabric.
Give every number a name and a unit
CottonWorks describes yarn numbering as a way to state yarn linear density, with different numbering systems in use. Ask the supplier to name the system and explain any notation for plied yarn. Do not read a bare number as a universal measure of thickness.
Fabric thread density concerns the yarns present over a stated fabric length. The public scope of ISO 7211-2 covers determining thread numbers in woven fabrics. It is a different measurement from the yarn’s own linear density or the fabric’s mass per area.
Is yarn count the same as fabric thread count? No. Keep yarn size and its numbering system separate from the number of warp ends and weft picks per stated length. Ask the supplier to complete both descriptions if they are needed to identify the cloth.
A small construction sheet is enough
Use a sheet that preserves the supplier’s original notation while providing a plain-language explanation. Do not silently convert unfamiliar units in a spreadsheet and discard the source.
- Fabric reference and intended component, such as the main body or contrast base.
- Weave, face and finish, with the stage at which the material is being described.
- Warp yarn size, numbering system and any stated ply construction.
- Weft yarn size, numbering system and any stated ply construction.
- Warp ends and weft picks per stated length, with the measurement basis identified.
- Finished fabric weight, composition requirement and retained swatch reference.
The entries need not become manufacturing instructions from the buyer. Their purpose is to identify the proposal clearly enough that the supplier can confirm it. If a value is unavailable, mark it as unconfirmed rather than copying a plausible figure from another cloth.
Compare the same material stage
Ask whether each description refers to unfinished cloth, dyed and finished cloth, or the actual cloth proposed for cutting. Keep that distinction visible when comparing quotations or an old material record with a new swatch.
If a measured report is supplied, check the specimen reference, method, units and material stage before comparing its figures. A report for an unidentified fabric cannot resolve whether the proposed body is the same construction as the approved reference.
Our quotation comparison guide deals with the wider commercial record. This construction sheet supplies the material identity behind the fabric line in that quote; it does not establish price, carrying capacity or certification.
Use the numbers to control substitution
Can equal GSM prove that two cotton fabrics are equivalent? No. Compare the identified yarns, thread density, weave, finish and the physical swatches as well. Equal weight alone does not settle their appearance or behaviour in a printed bag.
For example, a buyer may like the approved panel’s surface but receive another cloth offered at the same weight. The next step is to compare the construction records and samples, not declare that either supplier has necessarily made an error. The proposed substitute may simply be a different material.
Confirm a 100% cotton body requirement independently of the construction numbers. They do not prove composition, organic origin or an environmental saving. If the reusable tote also has different handles or trims, identify those components separately.
Carry the record into a repeat order
Attach the construction sheet to the selected swatch and finished bag reference. Identify which changes need approval before cutting, including a replacement fabric offered under a similar trade name. Our reorder guide explains how to preserve the rest of that history.
When enquiring with Gahumi, send the supplier’s original fabric description alongside your existing sample photographs, artwork and quantities. Ask us to review the material information and confirm what can be proposed. An honest blank in the sheet is more useful than a precise but unexplained number.
Email the original description to gzgahumibag@gmail.com.