Measure around your body under your arms and over the fullest part of your bust.
Measure around your body at your natural waistline. Keep the measuring tape comfortably loose.
Measure around the fullest part of your hips, placing the tape around midway between your crotch and belly button.
Take a pair of pants that fit you well and lay them flat. Measure the distance along the inner seam between the crotch and the hem.
With your bra on, measure firmly around your rib cage, underneath your breast. The measuring tape should be parallel with the ground. Please reference chart below for band measurements.
Step 1: 33" = 36 Band
Step 2: 38"
Step 3: 38" - 33" = 5", which is an E cup size in Prima Donna or DD in Elomi
Step 4: Refer to Sister size chart to see equivalent cup sizes by brand