How is it measured?

Chest : measure around the chest at its maximum circumference, the correct position of the measuring tape is just under the arms
Shoulders : measure at the maximum width from one shoulder to the other, measured from the back.

In between one size and another?
If your measurements are in between sizes in the chart, choose the larger size

All measurements are expressed in cm

St 90-94 41-42
m 96-100 42-43
L 102-106 43-44
XL 108-112 44-45
XXL 114-118 46-47
XXXL 118-120 46-47