Avg in IN. (CM)
Neck
Chest
Small
13 - 13.5 (33.5-35)
32.5 - 35.5 (83-90)
Medium
13.5 - 14.5 (35.5-37.5)
35.5 - 38.5 (90-98)
Large
14.5 - 15 (37.5-38.5)
38.5 - 41.5 (98-106)
Extra Large
15 - 15.5 (38.5-40)
41.5 - 44.5 (106-113.5)