You will have to provide yourself with a tape measure. We suggest you measure your chest size as well as your height. Take your measurements with your clothes on, at the fullest part of the chest.

Cut |
XS |
S |
M |
L |
XL |
2XL |
3XL |
4XL |
5XL |
6XL |
French size |
46 |
48 |
50 |
52 |
54 |
56 |
58 |
60 |
62 |
64 |
Chest (cm) |
<92 |
93/96 |
97/100 |
101/104 |
105/108 |
109/112 |
113/116 |
117/120 |
121/124 |
>125 |
Size (cm) |
<168 |
169/172 |
173/176 |
177/180 |
181/184 |
185/188 |
189/192 |
193/196 |
197/200 |
>201 |
Specific examples: A person measuring 181cm (normally XL) with a chest circumference of 97cm (normally M), we would recommend size L.
When the correspondence in size of the chest circumference is less than the correspondence of the height, we advise to take the in-between. Otherwise, we will recommend a size 2XL to a person measuring 1m77 with a chest measurement of 111cm.
Indeed when the correspondence in size of the chest circumference is greater than the correspondence of the height, we recommend the size equivalent to the chest circumference.
Warning: Do not hide that some products have removable liners that you will remove during hot seasons. So don’t take your jacket that’s too big! Be careful, leather models always cut a little smaller but relax.