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Shop Women's Swimwear at up to 90% off estimated retail! thredUP has a huge selection of gently used women's swimwear. Find bikinis, one-pieces, board shorts and cover ups from brands like Seafolly, Aqua or Speedo at thredUP.

32" WaistRemove filter28" WaistRemove filter
36 items
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    LIVI Swimsuit Top (view 2)LIVI Swimsuit Top (view 1)
    View Product: LIVI Swimsuit Top

    LIVI

    Swimsuit Top
    Size 26 Plus
    $27.99 $15.39 45% off with code GOBIG
    45% off estimated retail
    Avenue Swimsuit Top (view 2)Avenue Swimsuit Top (view 1)
    View Product: Avenue Swimsuit Top

    Avenue

    Swimsuit Top
    Size 26 Plus
    $17.99 $9.89 45% off with code GOBIG
    43% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 5X Plus
    $15.99 $8.79 45% off with code GOBIG
    36% off estimated retail
    Torrid Swimsuit Top (view 2)Torrid Swimsuit Top (view 1)
    View Product: Torrid Swimsuit Top

    Torrid

    Swimsuit Top
    Size 5X Plus
    $26.99 $14.84 45% off with code GOBIG
    47% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Torrid Swimsuit Cover Up (view 2)Torrid Swimsuit Cover Up (view 1)
    View Product: Torrid Swimsuit Cover Up

    Torrid

    Swimsuit Cover Up
    Size 5X Plus
    $30.99 $17.04 45% off with code GOBIG
    59% off estimated retail
    Swim by Cacique Swimsuit Bottoms (view 2)Swim by Cacique Swimsuit Bottoms (view 1)
    View Product: Swim by Cacique Swimsuit Bottoms

    Swim by Cacique

    Swimsuit Bottoms
    Size 26 Plus
    $22.99 $12.64 45% off with code GOBIG
    54% off estimated retail
    Lands' End One Piece Swimsuit (view 2)Lands' End One Piece Swimsuit (view 1)
    View Product: Lands' End One Piece Swimsuit

    Lands' End

    One Piece Swimsuit
    Size 26 Plus
    $34.99 $19.24 45% off with code GOBIG
    63% off estimated retail
    Curvy Kate Swimsuit Top (view 2)Curvy Kate Swimsuit Top (view 1)
    View Product: Curvy Kate Swimsuit Top

    Curvy Kate

    Swimsuit Top
    Size 5X Plus
    $14.99 $8.24 45% off with code GOBIG
    53% off estimated retail
    Lands' End Swimsuit Top (view 2)Lands' End Swimsuit Top (view 1)
    View Product: Lands' End Swimsuit Top

    Lands' End

    Swimsuit Top
    Size 26 Plus
    $22.99 $12.64 45% off with code GOBIG
    64% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 5X Plus
    $11.99 $6.59 45% off with code GOBIG
    52% off estimated retail
    Swim by Cacique Swimsuit Bottoms (view 2)Swim by Cacique Swimsuit Bottoms (view 1)
    View Product: Swim by Cacique Swimsuit Bottoms

    Swim by Cacique

    Swimsuit Bottoms
    Size 26 Plus
    $18.99 $10.44 45% off with code GOBIG
    62% off estimated retail
    Lands' End Swimsuit Top (view 2)Lands' End Swimsuit Top (view 1)
    View Product: Lands' End Swimsuit Top

    Lands' End

    Swimsuit Top
    Size 26 Plus
    $24.99 $13.74 45% off with code GOBIG
    60% off estimated retail
    Avenue Swimsuit Bottoms (view 2)Avenue Swimsuit Bottoms (view 1)
    View Product: Avenue Swimsuit Bottoms

    Avenue

    Swimsuit Bottoms
    Size 26 Plus
    $13.99 $7.69 45% off with code GOBIG
    56% off estimated retail
    Swim by Cacique Swimsuit Top (view 2)Swim by Cacique Swimsuit Top (view 1)
    View Product: Swim by Cacique Swimsuit Top

    Swim by Cacique

    Swimsuit Top
    Size 5X Plus
    $22.99 $12.64 45% off with code GOBIG
    54% off estimated retail
    Gavin One Piece Swimsuit (view 2)Gavin One Piece Swimsuit (view 1)
    View Product: Gavin One Piece Swimsuit

    Gavin

    One Piece Swimsuit
    Size 26 Plus
    $14.99 $8.24 45% off with code GOBIG
    48% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 5X Plus
    $10.99 $6.04 45% off with code GOBIG
    56% off estimated retail
    Swimsuits for all Swimsuit Cover Up (view 2)Swimsuits for all Swimsuit Cover Up (view 1)
    View Product: Swimsuits for all Swimsuit Cover Up

    Swimsuits for all

    Swimsuit Cover Up
    Size 26 Plus
    $22.99 $12.64 45% off with code GOBIG
    59% off estimated retail
    Danify Swimsuit Bottoms (view 2)Danify Swimsuit Bottoms (view 1)
    View Product: Danify Swimsuit Bottoms

    Danify

    Swimsuit Bottoms
    Size 5X Plus
    $10.99 $6.04 45% off with code GOBIG
    56% off estimated retail
    Swimsuits for all Swimsuit Bottoms (view 2)Swimsuits for all Swimsuit Bottoms (view 1)
    View Product: Swimsuits for all Swimsuit Bottoms

    Swimsuits for all

    Swimsuit Bottoms
    Size 26 Plus
    $13.99 $7.69 45% off with code GOBIG
    63% off estimated retail
    Athleta Swimsuit Top (view 2)Athleta Swimsuit Top (view 1)
    View Product: Athleta Swimsuit Top

    Athleta

    Swimsuit Top
    Size 5X Plus
    $28.99 $15.94 45% off with code GOBIG
    50% off estimated retail
    Beach Native One Piece Swimsuit (view 2)Beach Native One Piece Swimsuit (view 1)
    View Product: Beach Native One Piece Swimsuit

    Beach Native

    One Piece Swimsuit
    Size 26 Plus
    $19.99 $10.99 45% off with code GOBIG
    78% off estimated retail
    Inches Off Swimwear by Figure Magic Swimsuit Top (view 2)Inches Off Swimwear by Figure Magic Swimsuit Top (view 1)
    View Product: Inches Off Swimwear by Figure Magic Swimsuit Top

    Inches Off Swimwear by Figure Magic

    Swimsuit Top
    Size 26 Plus
    $22.99 $12.64 45% off with code GOBIG
    39% off estimated retail
    Unbranded Swimsuit Cover Up (view 2)Unbranded Swimsuit Cover Up (view 1)
    View Product: Unbranded Swimsuit Cover Up

    Unbranded

    Swimsuit Cover Up
    Size 5X Plus
    $19.99 $10.99 45% off with code GOBIG
    47% off estimated retail
    Lands' End One Piece Swimsuit (view 2)Lands' End One Piece Swimsuit (view 1)
    View Product: Lands' End One Piece Swimsuit

    Lands' End

    One Piece Swimsuit
    Size 26 Plus
    $28.99 $15.94 45% off with code GOBIG
    69% off estimated retail
    Assorted Brands Swimsuit Top (view 2)Assorted Brands Swimsuit Top (view 1)
    View Product: Assorted Brands Swimsuit Top

    Assorted Brands

    Swimsuit Top
    Size 5X Plus
    $13.99 $7.69 45% off with code GOBIG
    44% off estimated retail
    Panache Swimwear Swimsuit Bottoms (view 2)Panache Swimwear Swimsuit Bottoms (view 1)Price Drop
    View Product: Panache Swimwear Swimsuit Bottoms

    Panache Swimwear

    Swimsuit Bottoms
    Size 5X Plus
    $17.99 $9.89 45% off with code GOBIG
    64% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)Price Drop
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 5X Plus
    $9.99 $5.49 45% off with code GOBIG
    60% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)Price Drop
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 5X Plus
    $10.99 $6.04 45% off with code GOBIG
    56% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)Price Drop
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 5X Plus
    $10.99 $6.04 45% off with code GOBIG
    56% off estimated retail
    Coco Reef Swimsuit Top (view 2)Coco Reef Swimsuit Top (view 1)Price Drop
    View Product: Coco Reef Swimsuit Top

    Coco Reef

    Swimsuit Top
    Size 5X Plus
    $11.99 $6.59 45% off with code GOBIG
    76% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)Price Drop
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 5X Plus
    $10.99 $6.04 45% off with code GOBIG
    56% off estimated retail
    Sirena Swimsuit Top (view 2)Sirena Swimsuit Top (view 1)Price Drop
    View Product: Sirena Swimsuit Top

    Sirena

    Swimsuit Top
    Size 5X Plus
    $10.99 $6.04 45% off with code GOBIG
    65% off estimated retail
    Athleta Swimsuit Bottoms (view 2)Athleta Swimsuit Bottoms (view 1)Price Drop
    View Product: Athleta Swimsuit Bottoms

    Athleta

    Swimsuit Bottoms
    Size 5X Plus
    $9.99 $5.49 45% off with code GOBIG
    83% off estimated retail
    Leith Swimsuit Top (view 2)Leith Swimsuit Top (view 1)Price Drop
    View Product: Leith Swimsuit Top

    Leith

    Swimsuit Top
    Size 5X Plus
    $9.99 $5.49 45% off with code GOBIG
    84% off estimated retail
    Rose Gal Swimsuit Bottoms (view 2)Rose Gal Swimsuit Bottoms (view 1)Price Drop
    View Product: Rose Gal Swimsuit Bottoms

    Rose Gal

    Swimsuit Bottoms
    Size 5X Plus
    $8.99 $4.94 45% off with code GOBIG
    64% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)Price Drop
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 5X Plus
    $8.99 $4.94 45% off with code GOBIG
    64% off estimated retail
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