Size 30J Swimwear

Find 30J swimwear designed for a fuller bust, smaller band, and the kind of support standard swim sizing often misses. In this size, shallow cups can create spillover, while sizing up for bust room may leave the band too loose to anchor properly. Browse supportive bra-sized swim styles, explore 30J bikinis for two-piece options, or use our swimwear size chart to check your best starting point.