All drmers club pieces are in unisex sizing. For our tshirts: 

Size Chest (in) Body Length (in) Sleeve Length (in)
S 36 28 16.5
M 40 29 18
L 44 30 19.5
XL 48 31 21

Chest: Measure across whole chest in the front 
Body Length: Measure from HPS (highest point shoulder) 

*Sizing chart for reference only, there may be a manual measurement error of ~1-2cm