Item Size Waist Weight Packaging SCT72146 Small 25-33" Up to 125lbs pk16 SCT72146CS Small 25-33" Up to 125lbs Case of 4 SCT72246 Medium 34-44" 115 - 195lbs pk16 SCT72246CS Medium 34-44" 115 - 195lbs Case of 4 SCT72346 Large 45-58" Over 185lbs pk16 SCT72346CS Large 45-58" Over 185lbs Case of 4 SCT72412 X-Large 55-66" Over 185lbs pk12 SCT72412CS X-Large 55-66" OVer 185lbs Case of 4