Size (US) WAIST (US ) Thigh Knee Leg Opening
29W 31 11.75 8.25 6.5
30W 32 12 8.5 6.75
31W 33 12.25 8.75 7
32W  34 12.5 9 7.25
33W 35 12.75 9.25 7.5
34W 36 13 9.5 7.75
36W 38 13.5 10 8.25
38W 40 14 10.5 8.75
40W 42 14.5 11 9.25