← All articles · 2026-06-24

T-shirt weights explained: what is gsm, and 180 vs 200gsm+?

Short answer: GSM means grams per square meter — the fabric’s weight. 180gsm is light and budget-friendly; 200gsm+ is heavyweight, feels like a retail tee, and holds its shape better, which is why it’s the most popular choice for group apparel.

If you’ve ever wondered why two custom shirts can feel completely different, the answer is usually gsm. Here’s what the number means and how to choose.

What “gsm” actually measures

GSM = grams per square meter. It’s the weight of the fabric, not the thread count or quality on its own. A higher gsm means a thicker, heavier, more substantial fabric. Lower gsm feels lighter and more breathable but can feel thin or see-through in lighter colors.

GSM doesn’t tell you everything — a 200gsm combed cotton tee will feel better than a 200gsm basic cotton tee — but it’s the fastest way to picture how a shirt will feel before you order.

T-shirt weight tiers

GSM	Tier	Feel	Best for
~150–170	Lightweight	Thin, airy	Hot climates, lowest cost
~180	Budget standard	Soft, light	Big quantities on a budget
~200–220	Heavyweight	Substantial, retail feel	Most groups (most popular)
~230+	Premium heavyweight	Thick, structured	Premium merch, brand drops

180gsm vs 200gsm+: how to choose

Choose 180gsm when budget and quantity matter most, or for hot-weather events where breathability beats heft. Choose 200gsm+ combed cotton when you want shirts that feel like something people would buy in a store — they hold their shape, resist clinging, and make prints look premium. For most schools, teams, companies, and reunions, the 200gsm+ tier is the sweet spot.

How Togethread handles weight

Tell us how your group will wear the shirts and a dedicated designer recommends the right weight — free, before you pay. Most groups land on 200gsm+ heavyweight combed cotton for that retail feel. You’ll get a mockup within 24 hours, mixed sizes (youth to adult plus) ship at one price, and full-color or embroidery carries no per-color charge, with a 50-piece minimum.

FAQ

Is 180gsm too thin for a custom shirt? No — 180gsm is a solid, soft budget standard. It’s just lighter than 200gsm+, which feels more substantial and retail-like.

What gsm is a “good quality” t-shirt? Most people consider 200gsm+ combed cotton a quality, retail-feel tee. It holds shape and prints richly, which is why it’s the most popular tier for groups.

Does higher gsm mean better prints? Heavier combed cotton offers a smoother, more durable surface for printing, so prints often look and last better — but the cotton quality matters as much as the weight.

Related: Best fabric for printing, What is a heavyweight tee, Browse products

Want help picking the right weight for your group? → Start your quote