Underwire bikini tops from bra brands are your best bet.

Stick with bra manufacturers like Panache, Freya, or Elomi. They make swim tops with real underwire and bra-sized cups (30–40 bands, D–K cups). The support is legit.

Fast-fashion “plus-size” bikini tops from generic brands usually rely on stretchy fabric and flimsy straps. That works for a C cup maybe, but for a larger bust, you need structure. Underwire, thick straps, and a band that actually fits around your ribcage — not a S/M/L sizing system that lumps everyone together.

Also look for “full bust” or “DD+” specific lines. Miraclesuit makes some good ones if you want tummy control too. But the key is proper bra engineering, not cute prints.

Don’t waste money on a top that promises support but comes in one-size-fits-all. That’s a lie.