Linen Shirt Weight, Explained Simply

Linen shirt weight is measured in grams per square metre, or GSM. For summer, lighter usually wins: around 120 to 160 GSM is featherweight and very airy, while 160 to 200 GSM is the everyday sweet spot, soft and breathable but opaque enough to wear anywhere. Much above 200 GSM and linen moves into jacket territory.

What does GSM mean on a shirt?

GSM is simply how much a square metre of the fabric weighs. A lower number means a lighter, more open cloth; a higher number means a denser, heavier one. It is the most honest single spec for a shirt, because it tells you how the fabric will actually feel and behave in the heat, more than any marketing word does.

For linen specifically, weight changes three things you will notice: how much air moves through it, how much it lets the light through, and how it drapes.

120 to 160 GSM: featherweight summer linen

This is the lightest end. It feels almost weightless, moves with the smallest breeze, and dries fastest. It is the most cooling choice for peak heat and for travel.

The trade-off is that featherweight linen is the most translucent and the most relaxed in shape, so it leans casual. For a beach lunch or a still, hot afternoon, that is exactly what you want.

160 to 200 GSM: the everyday sweet spot

This is where most good summer linen shirts sit, and for good reason. It is still cool and breathable, but it has enough body to drape well, hold a collar, and read as a proper shirt rather than a beach cover-up. It is opaque enough for most situations and soft from the first wash.

If you want one linen shirt that works from midday to dinner, this is the weight to look for.

Is lightweight linen see-through?

A little, sometimes, and that is normal. Lighter linen held against strong sun will show some translucency. It is a sign the cloth is genuinely light and airy, not a defect.

Two things reduce it: a deeper colour, or a slightly higher weight. A soft pink or natural stone reads light and lets a touch more sun through; a deep navy or eucalyptus green reads more opaque. If full cover matters to you, size toward the mid-weight and the darker tones.

Is heavier linen better quality?

No. Heavier linen is not higher quality, just better suited to cooler weather. Quality comes from the fibre and the weave, not the weight. A well-made featherweight linen will outperform a poorly made heavy one in summer every time. Judge quality by hand-feel, weave and how it softens, as covered in our guide on how to tell if linen is good quality.

What weight we chose, and why

We cut the katú linen shirt 101 in a light, breathable summer weight, washed soft so it feels lived-in from the first wear. The aim is the everyday sweet spot: cool enough for the hottest afternoon, with enough drape to carry a long dinner. See the shirt in eucalyptus, navy, soft pink and natural stone.

Quick answers

What weight (GSM) linen shirt is best for summer? For most people, 160 to 200 GSM, the everyday sweet spot, cool but opaque and well-draping. Drop to 120 to 160 for peak heat and travel.

Is lightweight linen see-through? A little translucency in light colours and strong sun is normal, not a flaw. A deeper colour or a slightly heavier weave reduces it.

What does GSM mean on a shirt? It is the weight of one square metre of fabric. Lower is lighter and airier; higher is denser and warmer.

Is heavier linen better quality? No. Weight is about season, not quality. Quality comes from the fibre, weave and how the linen softens with washing.