this post was submitted on 15 Sep 2025
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I misstated the definition a bit, although in real world terms a higher GSM does often manifest as a thicker cloth. GSM stands for grams per square meter. It measures how much fabric weighs in a given area. It is a weight rating, not a thickness rating.
Higher GSM means denser, heavier fabric. Lower GSM means lighter, more breathable fabric.
General guide:
120โ140 GSM = lightweight (summer sheets, thin shirts)
150โ170 GSM = medium weight (jersey sheets, linen duvet covers)
180โ250 GSM = heavier weight (flannel, winter bedding)
GSM helps compare feel and durability across materials, but thickness will vary by fiber type.
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