Size 28G Bikinis

Size 28G bikinis are among the rarest in cup-sized swimwear — a very small band paired with a very full cup is a combination that mainstream brands almost never engineer for, leaving most 28G wearers either swimming in band fabric or compressed into a cup that's far too shallow. Every style here is selected specifically because it gets both measurements right, delivering the fit that this size actually calls for.

What to Look For in Size 28G Bikinis

The single most important thing to look for in size 28G bikinis is a brand that actually cuts a 28 band rather than one that approximates it by altering a 30 or 32 — a true 28 band is significantly firmer and shorter, and anything cut from a larger pattern will gap, ride up, and fail to anchor the cup correctly. Underwire shape is the next priority: at a 28G, the wire needs to be narrow enough to match the shorter ribcage measurement while still being deep and wide enough to contain a very full cup, which is a genuinely difficult engineering balance that only specialist brands achieve. Look for fully seamed or three-part cups that project outward for your cup volume rather than single-piece foam cups, which flatten and compress a 28G bust rather than supporting its natural shape. The underband should feel very firm on the loosest hook when new — at a 28 band, the elastic needs to be shorter and stronger than at larger bands, and any stretchiness in the band means it won't provide the anchoring a full G cup requires. Adjustable straps are worth prioritizing in size 28G bikinis since strap placement significantly affects lift and comfort when the band is this small; multiple adjustment positions let you fine-tune the fit without relying on the straps to compensate for band or cup issues. Finally, check that the center gore sits completely flat against your sternum — at 28G, a bridging gore is almost always a sign the cup is cut for less projection than your size requires.

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 28G? Browse our Size 28G Swimwear collection, or shop Size 28G Bras for everyday lingerie in your size.

Not sure if 28G is your correct size? Use our bikini size chart →