Natural waist ~ Measure around natural waist with a loose tape.
Drop waist~ Measure around your waist, where you like to wear your pants, with a loose tape.
Hips~ Measure around fullest part of body at top of legs. Keep feet together and tape parallel to floor.
Inseam~ Using pants that fit well, measure from the crotch seam to the inside bottom of the leg.
FSF "M Line" Night Stalker Hip Hugger for Women