Measure around the fullest part of your chest, under your arms, keeping the tape level. Match that number to the Body chest row below — not the garment's own width — to pick your size.

This is your body measurement, not the garment's. Fit then adds room on top of it: our regular training tees and shirts add roughly 10cm of ease at the chest; athletic/jersey styles (soccer jerseys, performance tees) sit closer to the body; relaxed and oversized styles are roomier again. Check the individual product's fit note if it gives one.

Between two sizes? If you prefer a closer fit, size down; for extra room, size up.