Fabrics & Craftsmanship
How to choose the right suit fabric weight
- Written by
- The Roomten tailors
- Published
- 2026-09-05
- Last reviewed
- 2026-09-05
- Reading time
- 5 min
- suit fabric weight
- suit cloth weight
- wool weight guide
- seasonal cloth
In short
Suit fabric weight is measured in grams per linear metre. 240–280g is ideal for summer, 280–340g is year-round, 340–420g is winter, and above 420g is for heavy overcoats or very cold climates.
Fabric weight tells you more about when to wear a cloth than how good it is. A heavy cloth is not better than a light one; it is simply built for a different climate and purpose.
Weight ranges
- 240–280g — summer and warm climates; lightweight, breathable, less insulating.
- 280–340g — the all-rounder; suitable for most British business suits.
- 340–420g — autumn and winter; warmer, richer drape, more presence.
- 420g+ — overcoats, heavy country jackets and very cold weather.
Weight is not the whole story
A high-twist 280g cloth can wear cooler than a loose 320g cloth. The weave, the fibre and the finish all affect how a suit feels. That is why we handle the cloth in person before finalising an order.
One suit or several?
If you own one suit, choose a 280–320g worsted. If you can add a second, make it a 340–380g flannel or a 250g high-twist summer cloth. A small rotation of the right weights will cover every season.