O'Brien Adult Nylon Vest Sizing

Adult Vest Chest Size
Adult XS 28" – 32"
Adult SM 32" – 36"
Adult MD 36" – 40"
Adult LG 40" – 44"
Adult XL 44" – 48"
Adult 2XL 48" – 52"
Adult 3XL 52" – 56"
Adult 4XL 56" – 62"
Adult 5XL 62" – 68"
   
Adult SM/MD 32" – 40"
Adult LG/XL 40" – 52"
Adult Super XL 50" – 60"
Adult EX-Super XL 60" – 70"