Leg: Left or Right Size(s): XS - 3XL The Shields II® is lower profile, lighter weight and more breathable, while maintaining the multi-use features of the original and proven Shields® Brace. Features and Benefits: Provides dynamic control of the patella reducing discomfort and enhancing recovery Trakaderm® U-shaped buttress allows for treatment of multiple patella indications and fine tuning the position of the patella no matter the malalignment One brace fits both left and right leg Independent calf and thigh straps adjust for contours of the leg Low Profile and extremely durable Hinges provide medial and lateral stability and can be removed for a step-down application Low profile design allows brace to be worn under clothing Size Chart(Measure 4" above mid-patella): Size Measurements XSmall 10-11.5" Small 12"-13.5" Medium 14"-16" Large 16.5"-19" XLarge 19.5"-22" XXLarge 22"-25" XXXLarge 25.5"-28"