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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.

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    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
    Catherines Swimsuit Top (view 2)Catherines Swimsuit Top (view 1)
    View Product: Catherines Swimsuit Top

    Catherines

    Swimsuit Top
    Size 5X Plus
    $14.99 $8.24 45% off with code GOBIG
    53% off estimated retail
    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
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Onia Swimsuit Bottoms (view 2)Onia Swimsuit Bottoms (view 1)Flawed Gem
    View Product: Onia Swimsuit Bottoms

    Onia

    Swimsuit Bottoms
    Size 5X Plus
    $30.99 $17.04 45% off with code GOBIG
    51% 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
    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
    Modli Swimsuit Cover Up (view 2)Modli Swimsuit Cover Up (view 1)
    View Product: Modli Swimsuit Cover Up

    Modli

    Swimsuit Cover Up
    Size 5X Plus
    $25.99 $14.29 45% off with code GOBIG
    59% 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
    Torrid Swimsuit Top (view 2)Torrid Swimsuit Top (view 1)
    View Product: Torrid Swimsuit Top

    Torrid

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

    Adore Me

    Swimsuit Bottoms
    Size 5X Plus
    $15.99 $8.79 45% off with code GOBIG
    50% 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 5X 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
    $10.99 $6.04 45% off with code GOBIG
    56% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 5X Plus
    $12.99 $7.14 45% off with code GOBIG
    48% 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
    Vitamin A Swimsuit Top (view 2)Vitamin A Swimsuit Top (view 1)New With Tags
    View Product: Vitamin A Swimsuit Top

    Vitamin A

    Swimsuit Top
    Size 5X Plus
    $47.99 $26.39 45% off with code GOBIG
    58% off estimated retail
    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size 5X Plus
    $17.99 $9.89 45% off with code GOBIG
    52% 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
    Shein Swimsuit Top (view 2)Shein Swimsuit Top (view 1)
    View Product: Shein Swimsuit Top

    Shein

    Swimsuit Top
    Size 5X Plus
    $5.99 $3.29 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 5X Plus
    $16.99 $9.34 45% off with code GOBIG
    73% off estimated retail
    Shade & Shore One Piece Swimsuit (view 2)Shade & Shore One Piece Swimsuit (view 1)
    View Product: Shade & Shore One Piece Swimsuit

    Shade & Shore

    One Piece Swimsuit
    Size 5X Plus
    $21.99 $12.09 45% off with code GOBIG
    54% 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
    Shein Swimsuit Bottoms (view 2)Shein Swimsuit Bottoms (view 1)
    View Product: Shein Swimsuit Bottoms

    Shein

    Swimsuit Bottoms
    Size 5X Plus
    $7.99 $4.39 45% off with code GOBIG
    50% off estimated retail
    Assorted Brands Swimsuit Bottoms (view 2)Assorted Brands Swimsuit Bottoms (view 1)
    View Product: Assorted Brands Swimsuit Bottoms

    Assorted Brands

    Swimsuit Bottoms
    Size 5X Plus
    $9.99 $5.49 45% off with code GOBIG
    60% off estimated retail
    Assorted Brands Rash Guard (view 2)Assorted Brands Rash Guard (view 1)
    View Product: Assorted Brands Rash Guard

    Assorted Brands

    Rash Guard
    Size 5X Plus
    $15.99 $8.79 45% off with code GOBIG
    57% 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
    Monif C. One Piece Swimsuit (view 2)Monif C. One Piece Swimsuit (view 1)
    View Product: Monif C. One Piece Swimsuit

    Monif C.

    One Piece Swimsuit
    Size 5X Plus
    $32.99 $18.14 45% off with code GOBIG
    71% 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
    Athleta Swimsuit Top (view 2)Athleta Swimsuit Top (view 1)New With Tags
    View Product: Athleta Swimsuit Top

    Athleta

    Swimsuit Top
    Size 5X Plus
    $26.99 $14.84 45% off with code GOBIG
    54% 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
    $14.99 $8.24 45% off with code GOBIG
    60% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

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

    Assorted Brands

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

    Pour Moi?

    Swimsuit Top
    Size 5X Plus
    $14.99 $8.24 45% off with code GOBIG
    40% off estimated retail
    Lands' End Swimsuit Top (view 2)Lands' End Swimsuit Top (view 1)Price Drop
    View Product: Lands' End Swimsuit Top

    Lands' End

    Swimsuit Top
    Size 5X Plus
    $18.99 $10.44 45% off with code GOBIG
    70% 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
    Assorted Brands Swimsuit Top (view 2)Assorted Brands Swimsuit Top (view 1)New With Tags
    View Product: Assorted Brands Swimsuit Top

    Assorted Brands

    Swimsuit Top
    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 Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)Price Drop
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 5X Plus
    $10.99 $6.04 45% off with code GOBIG
    56% 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
    $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
    PrimaDonna Swim Swimsuit Top (view 2)PrimaDonna Swim Swimsuit Top (view 1)New With Tags
    View Product: PrimaDonna Swim Swimsuit Top

    PrimaDonna Swim

    Swimsuit Top
    Size 5X Plus
    $9.99 $5.49 45% off with code GOBIG
    88% 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
    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
    Assorted Brands Swimsuit Bottoms (view 2)Assorted Brands Swimsuit Bottoms (view 1)Price Drop
    View Product: Assorted Brands Swimsuit Bottoms

    Assorted Brands

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

    Assorted Brands

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

    Rosegal

    Swimsuit Bottoms
    Size 5X Plus
    $9.99 $5.49 45% off with code GOBIG
    60% 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
    Venice Beach Swimsuit Bottoms (view 2)Venice Beach Swimsuit Bottoms (view 1)New With Tags
    View Product: Venice Beach Swimsuit Bottoms

    Venice Beach

    Swimsuit Bottoms
    Size 5X Plus
    $8.99 $4.94 45% off with code GOBIG
    76% 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
    Shein Swimsuit Bottoms (view 2)Shein Swimsuit Bottoms (view 1)Price Drop
    View Product: Shein Swimsuit Bottoms

    Shein

    Swimsuit Bottoms
    Size 5X Plus
    $8.99 $4.94 45% off with code GOBIG
    43% off estimated retail
    Rosegal Swimsuit Bottoms (view 2)Rosegal Swimsuit Bottoms (view 1)Price Drop
    View Product: Rosegal Swimsuit Bottoms

    Rosegal

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

    J.Crew

    Swimsuit Bottoms
    Size 5X Plus
    $8.99 $4.94 45% off with code GOBIG
    87% off estimated retail
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