Measure around knee and across kneecap for size:
Medium (12'' - 15.5'').
X-Large (15.5'' - 19'').

Technical Details

Product Details

Package Dimensions
Width : 3.7 inch
Height : 1.7 inch
Length : 6.3 inch

Shipping Weight: 2.4 ounce (View shipping rates and policies)

ASIN : B00KBXJM2I