A = Waistband Width

Lay the closed pants flat with buttons fastened. Measure from the left to the right side of the waistband.

B = Inseam

Measure straightly from crotch seam to the the inner hem.

C = Leg Opening

Measure on the flat pants once from the left to the right side of the hem.

D = Thigh Width

Measure on the flat pants once from the left to the right side of the thigh.

E = Rise

Measure straightly from the inner hem to the waistband.