Chest: With arms relaxed at sides, measure directly under your arms around the fullest part of your chest and shoulder blades, keeping tape parallel to floor. Vest sizes correspond to your Chest or Belly whichever is bigger.
.

                                                                  Size                         -                           Chest
                                                                  -------------------------------------------------------
                                                                   36                           l                                    36                         
                                                                   38                           l                                    38
                                                                   40                           l                                    40
                                                                   42                           l                                    42
                                                                   44                           l                                    44
                                                                   46                           l                                    46
                                                                   48                           l                                    48
                                                                   50                           l                                    50
                                                                   52                           l                                    52
                                                                   54                           l                                    54
                                                                   56                           l                                    56
                                                                   58                           l                                    58
                                                                   60                           l                                    60