Chest / Letter Size
36-38 = Small
40-42 = Medium
44-46 = Large
48-50 = XL
52-54 = 2XL
56-58 = 3XL
60 = 4XL
62 = 5XL
64 = 6XL
How many inches around is your chest (or belly if bigger)? Match that to the letter size above.
These vest run small. Order one or two sizes larger than normal. If in doubt between two sizes go with the larger size.