BEST ANSWER: Please view our interactive Size Guide which shows how to measure your body in order to choose the perfect size for your shape: https://www.swimsuitsforall.com/browse/sizeChartLanding.php?sc=13
Matching YOUR measurements to OUR size chart is the best way to order the right fit!
A 40 inch underbust = a size 20, for a D/DD cup size according to our size chart.
Or, call our Swim Stylists at 1.888.241.SWIM (7946) for personal fit assistance.
- Samantha Y Staff on Feb 16, 2018