Fox Racing Men's Shorts & Pants:

Fox Men's sizing runs similar to other brands

Waist: To measure the waist circumference, place a tape measure around your bare stomach just above the upper hip bone.

Hip: Measure the circumference about 23cm/9in below the waistline. Stand with feet together.

Inseam: Measure from the crotch to the bottom of the leg (or desired length of hem), running vertically down the inside of the leg.