Shirts are measured in Cm's. Width is across the front of the chest
6 - Width: 42 Length: 63
XS/8 - Width 44 Length: 64
S/10 - Width 46 Length: 65
M/12 - Width 49 Length: 66
L/14 - Width 51 Length: 67
XL/16 - Width 53 Length: 68
2XL/18 - Width 56 Length: 70
