3x-large Fits Knee Circum. 18.25 - 19.5 (measure Slightly Bent Underneath Knee Cap) Open Wrap Knee Brace Design Offers Flexible Application With The Option Of Three High Quality Removable Hinges Measure Slightly Bent Underneath Knee Cap Permits Functional Mobility While Ensuring Stability And Support Following Postoperative Ligament And Meniscus Surgery Hcpcs Suggested Code: L1810