How to choose men's thermal wear size
Updated 6 November 2026
Thermal wear should sit close to the body so it can keep warmth in, but it should not pinch. Here is how to get the size right the first time.
Measure your chest
Lay a well-fitting T-shirt flat and measure straight across the chest, just below the armpits. That flat width is what our size chart uses.
- S: 16 in flat chest
- M: 17 in flat chest
- L: 18 in flat chest
- XL: 19 in flat chest
Go one size up
Our men's thermal set runs small, so order one size above your usual T-shirt size. If you are between two sizes, choose the bigger one.
Wear and care
Wear thermals as the first layer, under your shirt or kurta, so they stay close to the skin. Follow the wash label on the garment; gentle washing and drying in the shade usually keep them soft and stretchy for longer.
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