Women's Plus Size Swimwear

Shop women's plus size swimwear across every cut: one-piece swimsuits, tankinis, swim dresses, bikinis, and athletic training suits. Plus size swimsuits here run from 14W through 4X with cup-sized options for D-plus bust support, built with reinforced underwire, wider straps, racing-back construction, and chlorine-resistant polyester. SwimOutlet carries a deep range of plus size athletic and chlorine-resistant swimwear for lap swim, water aerobics, and pool training, alongside full-coverage styles for beach and resort days. Filter by size, support type, coverage, and swim solution to find plus size swimwear built for how you swim.

Plus size swimwear covers the full range of swim categories built for sizes 14W through 4X, with extended cup-sized options for D-plus bust fit. The catalog spans one-piece swimsuits, tankinis, swim dresses, bikinis, board shorts, and athletic training cuts, with construction specific to plus-size fit including reinforced underwire, racing-back support, tummy-control panels, and chlorine-resistant polyester. Most plus-size shoppers split swimwear across two purposes: fashion and resort wear for the beach and pool, and athletic wear for lap swim and water aerobics.

Plus Size Swimsuit Cuts

• One-Piece Swimsuits: The most-purchased plus-size cut, in scoopneck, V-neck, surplice-front, racing-back, and high-neck styles with shelf-bra, underwire, and D-cup support construction.

• Tankinis: Two-piece sets with a tank-style top and separate bottom, so the top and bottom can be sized independently for full-torso coverage and mix-and-match fit.

• Swim Dresses: An A-line skirted swimsuit with a built-in bottom, giving upper-thigh and full-torso coverage in a single garment.

• Bikinis: Two-piece sets with extended-coverage cuts including high-waist bottoms, halter and underwire tops, and cup-sized fit options.

• Board Shorts and Swim Shorts: Standalone bottoms with 4-inch to 9-inch inseams for hip and thigh coverage, paired with a separate top.

Coverage and Support Construction

• Full Coverage: Higher front necklines, wider strap construction, and full-back coverage that stays in place during movement.

• Tummy-Control Panels: Built-in compression panels through the midsection that add smoothing and structure, standard on most Miraclesuit and Magicsuit plus-size styles.

• Built-In Shorts: An attached 2-inch to 4-inch inseam under the suit body for hip coverage without a separate cover-up.

• Underwire and Shelf-Bra Support: Cup-sized construction with reinforced bust support, the standard pick for D-cup and above.

• Racing-Back Construction: Wider shoulder coverage with a crossed-back strap design for added bust security during active swim.

Chlorine-Resistant Construction

Chlorine-resistant polyester suits last far longer than standard nylon-spandex in chlorinated pools. The fabric stretches less over time, holds color through repeated wash cycles, and keeps its shape through chemical exposure. This is the standard fabric pick for plus-size shoppers who swim weekly. Sporti, Penbrooke, and TYR build their plus-size lap swim ranges around chlorine-resistant polyester.

Athletic and Sports Cuts

Plus-size athletic swimwear covers lap swim, water aerobics, pool exercise, and competition training, with racing-back one-pieces, jammer-cut bottoms, and high-neck training tops. Construction includes reinforced seams, leg-grippers to prevent ride-up during movement, and chlorine-resistant polyester for durability. This is the segment where the SwimOutlet catalog runs deepest.

Size Range and Related Cuts

Sizing runs XS through 4X across the catalog, with numeric ranges 14W through 26W on many one-piece styles and cup-sized 36DD through 42G on underwire and structured-cup styles. Check each brand's size chart against your bust and torso measurements before ordering. For more on each cut, see women's one piece swimsuits, women's tankinis, and women's swim dresses.