I'm afraid that you regard the size as Euro Size and US Size.please do not follow system size chart !!!
if you want make a very correct choice you should choose by the size chart at the Second image !!!

>available:M，L，XL，XXL，

SIZE Shoulder Chest Length Sleeve
Unit CM CM CM CM
M 43.5 104 64.5 60
L 45 108 66.5 61.5
XL 46.5 112 68.5 63
XXL 48 116 70.5 64.5

Size Attention:

The item we sell are in Asian size ， usually 1-2 size smaller than Euro size!!!
so we suggest if you want make a correct choice you should choose by size chart!