SIZE2

 Size Hip(in)
XS 34-35.5
S 36-37.5
M 38-39.5
L 40-41.5
XL 42-43.5
2XL 44-45.5
3XL 46-47.5
4XL 48-49.5
5XL 50-51.5

The sizes are manually measured with error from 0.2 to 0.8 inches.