Size 40E Bikinis

A size 40E bikini sits at the intersection of larger band and significantly fuller cup — a combination that requires bikini engineering most brands won't even attempt. At this point, fit isn't about aesthetics; it's about physics. Your size 40E bikini needs to distribute weight intelligently, keep straps from sliding, and maintain cup integrity through real wear. We've curated this collection for 40E customers who refuse to compromise on support or settle for ill-fitting alternatives. Every style here is selected because it actually works for your proportions.

Common Fit Mistakes for Size 40E Bikinis

The biggest mistake 40E customers make is reaching for a size up in the band, thinking they need more room. What actually happens is the cup gets too wide and the support disappears entirely. Another common trap is choosing styles with thin or inadequate straps — at a 40E, your straps carry real weight and need to be wide, reinforced, and placed at the back shoulder rather than at the neck edge. Avoid bandeau tops and thin fabric entirely; they're not engineered for this size. Never accept a band that rides up — that's a sign the style isn't right for your proportions. The right size 40E bikini has structured cups, a firm band, and straps that mean something.

Cup-Sized Bikinis, Curated by Fit Experts

At The Bra Diva, we carry bikinis the same way we carry bras — by actual bra size, not just by small, medium, or large. Every style in this collection is selected for its construction quality, true-to-size fit, and ability to hold up in and out of the water. Our team has been fitting customers since 1987 at our Cherry Hill, NJ boutique, and we bring that same expertise to every size we carry online.

Shopping for more styles in size 40E? Browse our Size 40E Swimwear collection, or shop Size 40E Bras for everyday lingerie in your size.

Not sure if 40E is your correct size? Use our bikini size chart →