BEST ANSWER: An underbust measurement of 42 is equivalent to a size 22, D/DD.
The majority of our swimsuits are designed for C/D & D/DD cups, however many women DDD+ have purchased and feel very comfortable in our swimwear! It's really a matter of personal preference.
Be sure to shop our new cup-size Underwire swimsuits and swim tops now offered in C/D, D/DD, DD/F & F/G cup sizes!!
Browse them here: https://www.swimsuitsforall.com/Shop-All-Swimwear?go=Y&clearSelection=N&total=876&all=0&page=1&sort=&pageSelect=1&filterxxx2=182&dismissLargeSizeModal=N&filterPath=&sortBy=&
Please call our Swim Stylists at 1.888.241.SWIM (7946) for personalized assistance.
- Jessica F Staff on Apr 2, 2018