661 DBO D3O Elbow Pads Size Medium MTB Mountain Bike Protective Gear Armor ? Item: 661 DBO D3O Elbow Pads ? Size: Small- Bicep measurement: 8-10 in ? Condition: New ? Use: Mountain biking, trail riding, BMX, downhill --- ? Product Details: Premium D3O impact protection for elbows ? soft and flexible while riding, hardens on impact 661 (SixSixOne) DBO series offers reliable, lightweight, and breathable protection Ergonomic design with adjustable straps and stretch mesh for a secure, comfortable fit Ideal for mountain biking, BMX, enduro, trail, and downhill riders Reinforced stitching and high-wear materials for durability CE-certified protection trusted by riders worldwide How to Measure for Proper Elbow Pad Fit Measure around the widest part of your bicep with your elbow bent at a 90 angle. This ensures the pad will sit securely and comfortably when riding. --- How to Measure for Proper Elbow Pad Fit Measure around the widest part of your bicep with your elbow bent at a 90 angle. This ensures the pad will sit securely and comfortably when riding. --- Size Chart for 661 DBO Elbow Pads SizeBicep Circumference (in)Forearm Circumference (in) SM Bicep8 ? 10" Forearm 7 ? 8" MDBicep 10 ? 12" Forearm 8 ? 9" LGBicep 12 ? 14" Forearm 9 ? 10" --- Why Correct Fit Matters Proper protection coverage ? Ensures the D3O impact insert is positioned over the elbow. Secure, no-slip fit ? Minimizes shifting during aggressive mountain or trail riding. Enhanced comfort and flexibility ? Prevents chafing and allows full range of motion.