For bust size measure under the arms at the fullest point of your bra cup. Don’t forget to go underneath your arms and not around them.
For bra size, you need to measure underneath the bust area.
Measure around the natural waistline, which is the smallest part of your waist!
Standing with your heels together, measure around the fullest part of your hips. Make sure you keep the tape straight and parallel to the floor.
Make sure you are in a pair of pants that fit you well and also bare foot. Then take the measurement starting from the crotch seam down the inside of the pant leg to the floor.