DD Cup One Piece Swimsuits

DD cup one-piece swimsuits with built-in bra-sized support — structured or underwired cups, adjustable straps and full coverage that holds its shape. Fitted for a DD cup bust, sizes 6 to 24.

DD Cup Swimwear | DD Cup Bras | One Piece Swimsuits | Swimwear | Bikini Tops
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Rosa Faia Elouise Zip Front Swimsuit BlackRosa Faia Swimwear - Swimsuit Rosa Faia Elouise Zip Front Swimsuit Black
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Rosa Faia Elouise Zip Front Swimsuit Black
Sale price $159.95
Regular price $159.95 Sale price $139.95
Panache Spirit Rita Plunge Swimsuit BlackPanache Spirit Rita Plunge Swimsuit Black
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Panache Spirit Rita Plunge Swimsuit Black
Sale price $189.95
Regular price $189.95 Sale price $169.95
Sale price $189.95
Freya Freestyle UW Moulded Swimsuit Astral NavyFreya Freestyle UW Moulded Swimsuit Astral Navy
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Freya Freestyle UW Moulded Swimsuit Astral Navy
Sale price $134.95
Marvell Lane Swimwear - Swimsuit Marvell Lane Sofia Swimsuit BlackMarvell Lane Swimwear - Swimsuit Marvell Lane Sofia Swimsuit Black
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Marvell Lane Sofia Swimsuit Black
Regular price $219.95 Sale price $110.00
Panache Signature Zadie Full Cup Swimsuit BlackPanache Signature Zadie Full Cup Swimsuit Black
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Panache Signature Zadie Full Cup Swimsuit Black
Sale price $174.95
Panache Gingham Paloma Full Cup Swimsuit Blacksg-10-12 Panache Gingham Swimsuit
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Panache Gingham Paloma Full Cup Swimsuit Black
Sale price $169.95
Regular price $164.95 Sale price $119.95
Regular price $169.95 Sale price $154.95
Fantasie Swimwear - Swimsuit Fantasie Ottawa Twist Front Swimsuit InkFantasie Swimwear - Swimsuit Fantasie Ottawa Twist Front Swimsuit Ink
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Fantasie Ottawa Twist Front Swimsuit Ink
Sale price $154.95
Sale price $154.95
Panache Aurora Lara Plunge Swimsuit RedPanache Aurora Lara Plunge Swimsuit Red
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Panache Aurora Lara Plunge Swimsuit Red
Regular price $189.95 Sale price $174.95
Fantasie Beach Waves Twist Front Swimsuit Bright FuchsiaFantasie Beach Waves Twist Front Swimsuit Bright Fuchsia
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Fantasie Beach Waves Twist Front Swimsuit Bright Fuchsia
Regular price $149.95 Sale price $134.95
Fantasie Swimwear - Swimsuit Fantasie Ottawa Twist Front Swimsuit BlackFantasie Swimwear - Swimsuit Fantasie Ottawa Twist Front Swimsuit Black
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Fantasie Ottawa Twist Front Swimsuit Black
Sale price $154.95
Sale price $154.95
Panache Spirit Rita Plunge Swimsuit CobaltPanache Spirit Rita Plunge Swimsuit Cobalt
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Panache Spirit Rita Plunge Swimsuit Cobalt
Sale price $189.95
Sale price $189.95
Regular price $189.95 Sale price $169.95
Panache Signature Serena Square Neck Swimsuit BlackPanache Signature Serena Square Neck Swimsuit Black
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Panache Signature Serena Square Neck Swimsuit Black
Sale price $189.95

A one-piece is often the easiest choice at DD cup — built-in bra-sized support, full front coverage, and nothing to readjust in the water. The best DD cup one-pieces use the same cup construction as a bra: an underwire or moulded cup that lifts from below, adjustable straps, and a firm band around the body.

Choosing a one-piece at DD cup

Look for a defined, structured bust rather than a flat shelf lining — a shelf bra alone won't support a DD cup. Adjustable or convertible straps let you set the fit across the shoulders, and a slightly higher back or side panel keeps everything secure when you're swimming.

Styles and brands

Panache Swim, Fantasie Swim and Elomi Swim all make properly supportive DD cup one-pieces. Prefer a two-piece? See DD cup bikini tops and all DD cup swimwear. Sizes 6 to 20.