GSM describes mass per square metre. It does not, by itself, describe the way a cloth feels, bends or behaves within a coat construction. When two references have similar reported weights, keep their article information and physical observations side by side before deciding which one to test further.
Compare references Download a sample comparison worksheet
Check that the weight information is comparable
Start with the unit and the state of the sample described by the specification. A value stated per linear metre is not a GSM value. Converting it requires a known width corresponding to that measured material.
Also distinguish total width from usable width. Use the width that matches the mass and area being described. A smaller usable-width figure should not silently replace the total width in a calculation of a whole roll's fabric mass.
If the unit, width basis or measurement condition is unclear, keep the value in its original form and ask for clarification. A complete-looking table is less useful than a table that shows a real unanswered question.
Record other known information without filling the gaps
Keep the composition, construction information, surface description and sample revision with the weight. These help organise the comparison. Do not infer a composition from handling or assign a thickness from a photograph.
| Field | Reference A | Reference B | Basis |
|---|---|---|---|
| Sample and article identity | Enter the actual identity | Enter the actual identity | Label or confirmed record |
| Reported weight and unit | Enter the supplied value | Enter the supplied value | Include the stated condition |
| Total and usable width | Record separately where known | Record separately where known | Preserve the width definition |
| Composition | Confirmed information or open | Confirmed information or open | Link the applicable evidence |
| Surface or finish | Description tied to the sample | Description tied to the sample | Distinguish supplier information from your observation |
Use the same observation setup
Choose samples of comparable size where practical and identify the face and direction. Use consistent light for photographs. Record how a bend, hang or folded comparison was arranged, especially when the observations will be shared with another person.
A hand-held sample photograph can be useful for discussion, but it is not a calibrated test of stiffness, drape or thickness. Use plain language to describe what you observed and retain the physical references.
| Observation | What to record | A useful question for the next stage |
|---|---|---|
| Flat appearance | Surface, visible direction and observation conditions | Does this appearance fit the intended garment? |
| Bend or hang | Sample size, support and handling setup | Which reference should be tried in the intended shape? |
| Folded or layered sample | Number and identity of actual materials | Which local garment detail should be made? |
| Return after handling | What was done and when it was observed | Is a more controlled test or repeat observation needed? |
Move the comparison to the garment detail
For a tailored coat, the next useful trial may be the collar and front. For a wrap coat, it may be a larger hanging sample, belt fold or hem. Choose the trial from the decision you need to make.
Add the intended lining and supporting materials when the question concerns the final combination. Record changes so that observations from different combinations are not treated as if they came from the same trial.
Choose the garment details to test
Keep a decision record
After the comparison, write why a reference remains under consideration, what information is missing and what the next sample must help you decide. Avoid declaring a universal winner. The useful choice is the one that fits the actual brief and its confirmed requirements.
Example of a buyer observation: “We prefer the fold and surface of reference A for this coat front. Please confirm its composition and usable width, and advise sample metreage for a collar and facing trial.”
This is a communication example, not a result from a Fred Textile product test.
Send the remaining questions with your sample request
Include the reference identities, fixed material requirements, intended garment and the observations you want to review. Ask Fred for the current article information and a suitable sample format. Keep buyer targets and confirmed supplier information separate in the resulting brief.
Common questions
Can GSM be converted to thickness? Not from GSM alone. Thickness needs its own measurement and conditions; a universal conversion would introduce an unsupported assumption about the material.
Does a softer hand mean a lower weight? Do not use that impression to assign a weight. Record the measured or supplied weight separately from your handling observation.
What should I do if only one sample has a specification? Keep the second record incomplete and ask for the missing information. You can still compare appearance while stating exactly which requirements remain unconfirmed.
When you have one swatch and only a photograph of the alternative
Treat the photograph as a visual direction, with bend, thickness and construction behaviour still unknown. Even if both labels show similar GSM, one physical swatch and one image have not undergone a comparable handling review. Request an identified cutting of the second candidate in a format suitable for the same observation. Keep its original specification and any unclear units attached to the request.
If the preferred sample later performs differently in a collar trial, check the facing, support materials and pattern revision before attributing the difference to face-fabric weight. Where practical, compare one changed factor at a time and retain the previous combination. Write a decision such as 'keep for another trial', 'request missing evidence' or 'do not advance against this fixed requirement'. A provisional choice is useful when its limits are visible; it should not silently become a claim that an unseen fabric passed the same test. Record whose next action will close the uncertainty and which reference revision their reply must identify.
A supplier says equivalent, but the new cutting or specification differs
Ask what equivalent refers to: collection direction, a stated specification, or the actual material represented by the replacement cutting. Keep the original labels and reply together. If an article code, finish description or specification version has changed, add a separate candidate record and state which comparisons remain relevant. If identity is unchanged but the observation differs, repeat a comparable physical observation before deciding that the cloth has changed. Do not average two conflicting specifications into a new value or let a favourable hand assessment override an unresolved fixed requirement.
Close the follow-up with one of three explicit outcomes: the missing information now identifies this cutting, a specific observation needs repeating, or the candidate remains on hold against a named requirement. A useful request might read: please identify the received cutting against the current article information and clarify which earlier statement applies. Keep the reply date and the actual evidence with the record. Resolving that point permits the next sample decision; it does not extend a swatch preference to bulk approval, other colours or a different garment construction.
Two reviewers describe the same Melton swatch differently
Replace broad words such as soft or firm with the action each person observed: surface contact, a supported bend or a hanging area. Confirm that both handled the same identified cutting, face and direction. Ask each reviewer to record the observation before discussing a preference. Agreement is not a vote on fabric quality; the question is whether the observation helps decide this coat detail.
If the difference remains, retain both descriptions and state their settings. Choose the next physical trial from the unresolved garment question rather than averaging personal scores. A useful handover reads: the surface preference is recorded, but the intended front fold still needs a trial with the planned facing. Ask for the identified material needed for that trial. Keep a hard composition or care requirement open until its own evidence is available.