Rise

The length from the fork (where the legs meet at the crotch) to the top edge, measured along the fly

Inside Leg

The length from the fork (where the legs meet at the crotch) to the trouser hem, measured along the inside seam

Leg Length

The length from the top of the waistband to the trouser hem measured along the outside seam

Leg Opening

Lay the trouser leg flat and double the measurement of the hem. Flatten pleated or creased trousers along their natural crease