Size Guide
This information is an approximate size guide to help you order. 
XS - 36-38 Inch Chest (91-96cm)
S - 38-40 Inch Chest (96-101cm)
M - 40-42 Inch Chest (101-107cm)
L - 42-44 Inch Chest (107-112cm)
XL - 44-46 Inch Chest (112-117cm)
2XL - 46-48 Inch Chest (117-122cm)
3XL - 50-52 Inch Chest (127-132cm)
4XL - 52-54 Inch Chest (132-137cm)
5XL - 54-56 Inch Chest (137-142cm)
6XL - 58-60 Inch Chest (147-152cm)