To determine your correct size measure the widest area around your hips (as indicated in the diagram) then refer to the size chart below.
To check for correct size
To ensure the correct size is worn check that the central pod of the protective shield is sitting over, or very near to, the greater trochanter as indicated in the picture below.
How to locate the greater trochanter
The hip bone (greater trochanter) is shaped like a bony ball and found at the top of the thigh bone (femur). To locate this bone, place your fingers on the side of the hip. Raise the knee slightly while noting the movement of the underlying bone.
refer to body size not garment dimensions. In instances where your measurements are between two sizes chose a smaller size for a firmer fit or the larger size for a more generous fit.