Standard American Sizing.

Men's

Size
Small
Medium
Large
XL
2X
Width
18"
20"
22"
24"
26"
Length
28"
29"
30"
31"
32"
Chest
34-36"
38-40"
42-44"
46-48"
50-52"

Junior / Women's

Size
Small
Medium
Large
XL
Dress
0-2
4-6
8-10
12-14
Chest
30-32"
32-34"
36-38"
40-42
Waist
25-26"
27-28"
30-32"
33-35"