Burpee Box Jumps 5mm Neoprene Shin Guards are perfect for crossfit and weightlifting. Save your shins on rope climbs, deadlifts, box jumps, and more. For sizing please measure around the largest part of your calf. S/M = 12.5-15.5 inches (32-39cm) L/XL = 15.5-18.0 inches (39-46cm)