Female Size Chart and Male Size Chart
Female Size Chart
S--Wait:22"-31",Short Length:14.5",Height:63"-65",Weight:99-121 lbs
M--Wait:24"-34",Short Length:15",Height:65"-67",Weight:121-143 lbs
L--Wait:26"-36",Short Length:15.5",Height:67"-69",Weight:143-165 lbs
XL--Wait:28"-39",Short Length:16",Height:69"-71",Weight:163-176 lbs
XXL--Wait:29"-40",Short Length:16.5",Height:71"-73",Weight:>176 lbs
Tips: Ohmotor 3D Padded Protective Shorts runs 2 sizes smaller than US size generally. For example, 2XL is same as US-L. Or you can take Customer Questions & Answers or Reference standard as reference to choose your size.