Original product 

Custom fit

Size Xs - to fit chest 38
Size S - to fit chest 40
Size M - to fit chest 42
Size L - to fit chest 44
Size Xl - to fit chest 46
Size 2xl - to fit chest 48
Size 3xl - to fit chest 50

Classic fit

Size Xs - to fit chest 40
Size S - to fit chest 42
Size M - to fit chest 44
Size L - to fit chest 46
Size Xl - to fit chest 48
Size 2xl - to fit chest 50
Size 3xl - to fit chest 52

Slim fit

Size Xs - to fit chest 38
Size S - to fit chest 40
Size M - to fit chest 42
Size L - to fit chest 44
Size Xl - to fit chest 46
Size 2xl - to fit chest 48
Size 3xl - to fit chest 50