The V2.0 line of rash guards run slightly large for most customers. If you order a 'L' with other with other brands, consider ordering the V2.0s in 'M' size.

Rash Guard Size Guide

Size  B (Chest) D (Waist)
S 34" - 36" 28" - 29"
M 38" - 40" 30" - 32"
L 42" - 44" 34" - 36"
XL 46" - 48" 38" - 40"
XXL 50" - 52" 42" - 44"