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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.

66 items
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    Danify Swimsuit Bottoms (view 2)Danify Swimsuit Bottoms (view 1)
    View Product: Danify Swimsuit Bottoms

    Danify

    Swimsuit Bottoms
    Size 5X Plus
    $12.99
    48% 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
    58% off estimated retail
    Torrid Swimsuit Top (view 2)Torrid Swimsuit Top (view 1)New With Tags
    View Product: Torrid Swimsuit Top

    Torrid

    Swimsuit Top
    Size 5X Plus
    $33.99
    59% 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
    $15.99
    57% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    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
    $13.99
    44% 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
    $15.99
    57% 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
    $18.99
    50% 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
    52% 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
    $14.99
    60% off estimated retail
    Torrid Swimsuit Top (view 2)Torrid Swimsuit Top (view 1)
    View Product: Torrid Swimsuit Top

    Torrid

    Swimsuit Top
    Size 5X Plus
    $24.99
    51% 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
    48% off estimated retail
    Athleta Swimsuit Top (view 2)Athleta Swimsuit Top (view 1)
    View Product: Athleta Swimsuit Top

    Athleta

    Swimsuit Top
    Size 5X Plus
    $25.99 $15.59 40% off with code SHINE
    55% off estimated retail
    Shein Swimsuit Top (view 2)Shein Swimsuit Top (view 1)
    View Product: Shein Swimsuit Top

    Shein

    Swimsuit Top
    Size 5X Plus
    $10.99 $8.79 20% off with code SHINE
    31% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 5X Plus
    $11.99 $8.39 30% off with code SHINE
    52% off estimated retail
    Torrid Swimsuit Bottoms (view 2)Torrid Swimsuit Bottoms (view 1)
    View Product: Torrid Swimsuit Bottoms

    Torrid

    Swimsuit Bottoms
    Size 5X Plus
    $21.99 $9.90 55% off with code SHINE
    56% 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
    $14.99 $9.74 35% off with code SHINE
    60% 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
    $21.99 $13.19 40% off with code SHINE
    65% 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
    $31.99 $17.59 45% off with code SHINE
    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 $9.09 30% off with code SHINE
    48% 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 $15.39 30% off with code SHINE
    54% off estimated retail
    Terra & Sky Swimsuit Top (view 2)Terra & Sky Swimsuit Top (view 1)
    View Product: Terra & Sky Swimsuit Top

    Terra & Sky

    Swimsuit Top
    Size 5X Plus
    $12.99 $9.74 25% off with code SHINE
    $13
    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 $11.99 40% off with code SHINE
    47% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 5X Plus
    $11.99 $8.39 30% off with code SHINE
    52% 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 $6.39 20% off with code SHINE
    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 $6.99 30% off with code SHINE
    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
    $19.99 $10.00 50% off with code SHINE
    47% 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
    $17.99 $9.89 45% off with code SHINE
    52% 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 SHINE
    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 SHINE
    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 $23.09 30% off with code SHINE
    71% off estimated retail
    GDKEY Swimsuit Cover Up (view 2)GDKEY Swimsuit Cover Up (view 1)
    View Product: GDKEY Swimsuit Cover Up

    GDKEY

    Swimsuit Cover Up
    Size 5X Plus
    $21.99 $15.39 30% off with code SHINE
    42% 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 $6.59 40% off with code SHINE
    56% 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
    $27.99 $11.20 60% off with code SHINE
    63% off estimated retail
    In every Story Swimsuit Bottoms (view 2)In every Story Swimsuit Bottoms (view 1)New With Tags
    View Product: In every Story Swimsuit Bottoms

    In every Story

    Swimsuit Bottoms
    Size 5X Plus
    $16.99 $11.89 30% off with code SHINE
    65% 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 $17.54 35% off with code SHINE
    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 $7.50 50% off with code SHINE
    60% off estimated retail
    Assorted Brands One Piece Swimsuit (view 2)Assorted Brands One Piece Swimsuit (view 1)
    View Product: Assorted Brands One Piece Swimsuit

    Assorted Brands

    One Piece Swimsuit
    Size 5X Plus
    $17.99 $9.00 50% off with code SHINE
    52% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 5X Plus
    $16.99 $8.50 50% off with code SHINE
    32% 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 $6.59 40% off with code SHINE
    56% off estimated retail
    Assorted Brands One Piece Swimsuit (view 2)Assorted Brands One Piece Swimsuit (view 1)Price Drop
    View Product: Assorted Brands One Piece Swimsuit

    Assorted Brands

    One Piece Swimsuit
    Size 5X Plus
    $18.99 $9.50 50% off with code SHINE
    50% 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
    $16.99 $10.19 40% off with code SHINE
    32% 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
    $21.99 $13.19 40% off with code SHINE
    65% 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
    $20.99 $13.64 35% off with code SHINE
    58% 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 $6.49 35% off with code SHINE
    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
    $11.99 $6.59 45% off with code SHINE
    52% 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 $6.49 35% off with code SHINE
    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
    $11.99 $6.59 45% off with code SHINE
    52% 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 $6.59 40% off with code SHINE
    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 $6.59 40% off with code SHINE
    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 $8.99 25% off with code SHINE
    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
    $11.99 $6.59 45% off with code SHINE
    52% 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
    $11.99 $8.99 25% off with code SHINE
    62% 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 $7.99 20% off with code SHINE
    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
    $10.99 $8.24 25% off with code SHINE
    81% 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 $5.99 40% off with code SHINE
    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 $5.99 40% off with code SHINE
    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 $6.29 30% off with code SHINE
    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 $6.49 35% off with code SHINE
    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 $6.99 30% off with code SHINE
    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 $7.19 20% off with code SHINE
    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 $6.29 30% off with code SHINE
    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 $5.84 35% off with code SHINE
    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 $6.74 25% off with code SHINE
    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 $6.29 30% off with code SHINE
    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 $7.19 20% off with code SHINE
    87% 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
    $6.99 $5.59 20% off with code SHINE
    53% off estimated retail
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