CHEST: Measured Pit to Pit
LENGTH: From the top of the shoulder where it meets the collar seam to the bottom of the waistband
SLEEVE: From the top of the shoulder where it meets the sleeve cap to the bottom of the cuff
SHOULDERS: Turn the jacket over (so you're not measuring over the front collar) and measure from the edge of the highest part of the shoulder seam to the opposite shoulder seam (the pic is a good representation of the shoulder points just turn the jacket over).

MEASUREMENTS |
XS |
S |
M |
L |
XL |
XXL |
XXXL |
CHEST |
38 |
40 |
42 |
44 |
46 |
48 |
50 |
SLEEVE LENGTH |
25 |
25.5 |
26 |
26.5 |
27 |
27 |
27.5 |
VERTICAL LENGTH (Front) |
25.5 |
26 |
26 |
26.5 |
27 |
27.5 |
28 |
SHOULDER TO SHOULDER |
16 |
17 |
18 |
19 |
20 |
21 |
22 |