What fabric GSM means for buyers

GSM means grams per square metre. It describes mass over area, which makes it useful for comparing cloth without relying on roll width. A range such as 120–200 gsm means the named product direction covers more than one construction or commercial version; it should not be silently reduced to a single midpoint.

FabStitch preserves stated ranges. When the reference does not provide GSM, the page does not manufacture a number from the fibre name or a photograph.

Buyers often sort cloth into light, medium and heavy programmes for shirts, dresses, trousers or coats. Those labels are useful conversation tools, but FabStitch does not invent universal GSM cutoffs for each category.

When a fabric page shows GSM, use it to compare candidates inside your brief. When GSM is absent, rely on construction, characteristics and inquiry — do not guess a chart value.

Weight is not drape, opacity, stretch or warmth. A tightly woven cloth and an open weave can share a similar GSM while transmitting light and moving very differently. Fibre, yarn twist, knit or weave structure, finishing and pile all change the result.

That is why FabStitch places weight beside composition, construction and characteristics. Use the number to narrow a decision, then read the rest of the specification.

Not every textile category is best described by GSM. Silk entries may use momme, denim uses ounces per square yard, technical ripstop may use denier, knitwear may state gauge or fibre micron, corduroy uses wale, and upholstery may state Martindale abrasion cycles.

These units are not converted into false equivalents. They measure different properties, so the catalog displays the source unit attached to the product. Approximate oz↔GSM conversion belongs in sampling conversations when both parties agree — not as invented PDP fields.

Write the published GSM, or the words “not published”, next to construction and fibre. A 180 GSM cotton jersey and a 180 GSM cotton poplin can share a number and still cut, curl, and cover differently, because one is a knit and the other is a weave. Denim pages may state ounces per square yard instead of GSM. Do not convert that ounce figure into a GSM on the inquiry unless both sides have agreed the conversion.

Ask for width, shrinkage, and finish only when the garment needs them and the fabric page is silent. Do not treat a heavier cloth as higher quality. Opacity, drape, and warmth are separate checks.

Use the marketplace GSM filter only when the product has a stated GSM range. An upper or lower bound returns fabrics whose documented range overlaps the request. Products with no supported GSM are excluded from a GSM-constrained result rather than guessed into it.

After filtering, open the product page to confirm the range, season, construction and applications. Pair this guide with lightweight fabric guidance and woven vs knit notes when mass and structure are both undecided.