Under Armour T-Shirt Sizing
 
Men's Size Chest (inches) Chest (cm)
S 34-36 86-91
M 38-40 97-102
L 42-44 107-112
XL 46-48 117-122
XXL 50-52 127-132
XXXL 54-56 137-142
 
Youth Size Chest (inches) Chest (cm)
S (YOUTH) 26 - 28 66 - 71
M (YOUTH) 28 - 30 71 - 76
L (YOUTH) 30 - 32 76 - 81
XL (YOUTH) 32 - 34 81 - 86
 
See our complete fitting guide here