The Compressor Sacroiliac Brace Options:X Large BK983 Used for gross abdomens abdominal Used for gross abdomens abdominal incisional hernias and general abdominal support 6" Above Mid Knee 6" Below X Small 12 1 4" 13 1 4" 11 1 2" 12 1 2" 10 3 4" 11 1 4" Small 14 1 2" 15 1 2" 13" 14" 11 3 4" 12 1 4" Small Medium 15 1 2" 16 1 2" 13 1 2" 14 1 2" 12 1 2" 13 1 2" Medium 16 1 2" 17 1 2" 14 1 2" 15 1 2" 13 1 2" 14 1 2" Medium Large 18" 19" 15 1 2" 16 1 2" 14" 15" Large 19 1 2" 20 1 2" 15 1 2" 16 1 2" 14 1 2" 15 1 2" Large X Large 20 1 2" 21 1 2" 16" 17" 15 1 2" 16 1 2" X Large 21 1 2" 22 1 2" 16 1 2" 17 1 2" 16 1 2" 17 1 2" XX Large 22 1 2" 23 1 2" 17 1 2" 18 1 2" 17 1 2" 18 1 2" The COM PRESSOR allows customization such that the pelvis can be compressed where it is needed the most The COM PRESSOR is a pelvic belt which applies a variable amount of compression to specific locations of the pelvis