WAIST is taken at the top of the hipbone over shirt (not over pants). Tape should only be held snug, do not hold tape tight.
INSEAM is taken from the base of the crotch to the top of the shoe or boot. For jeans, add one inch.
It is advisable to ask the person being measured how he or she wears their pants. Not everyone wears their pants or jeans the same length or height on their hips.