Bust - measure around the fullest part of your bust with a bra or bathingsuit on. Remember, your bra size is not your chest measurement!
Waist - measure around your natural waistline. Pull tape as much as possible and hold your stomach as much as you can.
Hips -for jackets: measure 2 to 3 inches below waist,
for pants: measure around the fullest part of your hips.

Ultra Stretch Neo responds to water differently - it stretches much more and expands even more in the water: go down 1 whole size when ordering USN.