Men
Size Alpha Chest in Inches Waist in Inches
26 XS 32 26
28 S 34 28
30 S 36 30
32 M 38 32
34 M 40 34
36 L 42 36
38 L 44 38
40 XL 46 40
42 XL 48 42
44 XXL 50 44
46 XXL 52 46
48 3XL 54 48
50 3XL 56 50
52 4XL 58 52
54 4XL 60 54

How to Measure Men's Sizes:

Measuring Guidelines for Men Chest With arms relaxed at sides, measure directly under your armpits and around the fullest part of your chest and shoulder blades. Keep tape measure parallel to the floor.
Waist Measure across your natural waist, at the point where you usually wear your pants. Keep tape measure comfortably loose and parallel to the floor.