RCAI Knee Immobilizer Constructed of breathable, washable wicking material that "wicks" away moisture from the skin. The movable tri-panel design to accommodate multiple circumference sizes. The posterior aspect of the splint is uniquely tailored for a more custom anatomical fit. Available in Pediatric, Standard and now Bariatric sizes. Pediatric and Bariatric immobilizers are Single Panel only. Suggested code: L1830. Sizing: Measure mid-thigh circumference. Pediatric: Length 6" fits 6" to 10-1/4" Standard: Length 9" fits 11" - 16" Length 12" fits 14" - 20" Length 15" fits 16" - 22" Length 18" fits 18" - 28" Length 21" fits 19" - 30" Length 24" fits 19" - 32" Bariatric: Length 15" fits Max. 32" Length 18" fits Max. 34" Length 21" fits Max. 36" Length 24" fits Max. 39"