Size	Chest (in)	Waist (in)	Sleeve Length (in)	Back Length (in)
XS	32-34	26-28	31-33	24-26
S	35-37	29-31	34-36	26-28
M	38-40	32-34	37-39	28-30
L	41-43	35-37	40-42	30-32
XL	44-46	38-40	43-45	32-34

How to Measure:

Chest: Measure around the fullest part of your chest, keeping the tape parallel to the ground.
Waist: Measure around the narrowest part of your waist, usually just above your belly button.
Sleeve Length: Measure from the shoulder seam down to the wrist, with your arm slightly bent.
Back Length: Measure from the base of your neck to the bottom of the jacket, where you want it to end.

Klein detail. Grote persoonlijkheid.