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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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    Catalina Swimsuit Bottoms (view 2)Catalina Swimsuit Bottoms (view 1)
    View Product: Catalina Swimsuit Bottoms

    Catalina

    Swimsuit Bottoms
    Size 2X Plus
    $12.99 $13
    Shein Swimsuit Top (view 2)Shein Swimsuit Top (view 1)
    View Product: Shein Swimsuit Top

    Shein

    Swimsuit Top
    Size 2X Plus
    $12.99
    18% 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 2X Plus
    $15.99
    57% off estimated retail
    Shein Swimsuit Top (view 2)Shein Swimsuit Top (view 1)
    View Product: Shein Swimsuit Top

    Shein

    Swimsuit Top
    Size 2X Plus
    $12.99 $9.74 25% off with code THANKU
    18% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Old Navy Swimsuit Bottoms (view 2)Old Navy Swimsuit Bottoms (view 1)
    View Product: Old Navy Swimsuit Bottoms

    Old Navy

    Swimsuit Bottoms
    Size 2X Plus
    $11.99 $8.99 25% off with code THANKU
    52% off estimated retail
    Yitty Swimsuit Bottoms (view 2)Yitty Swimsuit Bottoms (view 1)New With Tags
    View Product: Yitty Swimsuit Bottoms

    Yitty

    Swimsuit Bottoms
    Size 2X Plus
    $25.99 $18.19 30% off with code THANKU
    34% off estimated retail
    Old Navy Swimsuit Top (view 2)Old Navy Swimsuit Top (view 1)New With Tags
    View Product: Old Navy Swimsuit Top

    Old Navy

    Swimsuit Top
    Size 2X Plus
    $16.99 $11.89 30% off with code THANKU
    51% off estimated retail
    SWIM 365 Swimsuit Bottoms (view 2)SWIM 365 Swimsuit Bottoms (view 1)
    View Product: SWIM 365 Swimsuit Bottoms

    SWIM 365

    Swimsuit Bottoms
    Size 28 Plus
    $8.99 $7.19 20% off with code THANKU
    30% off estimated retail
    Nike Swimsuit Bottoms (view 2)Nike Swimsuit Bottoms (view 1)New With Tags
    View Product: Nike Swimsuit Bottoms

    Nike

    Swimsuit Bottoms
    Size 28 Plus
    $13.99 $10.49 25% off with code THANKU
    72% off estimated retail
    Shein Swimsuit Top (view 2)Shein Swimsuit Top (view 1)
    View Product: Shein Swimsuit Top

    Shein

    Swimsuit Top
    Size 2X Plus
    $13.99 $10.49 25% off with code THANKU
    12% 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 28 Plus
    $12.99 $10.39 20% off with code THANKU
    48% off estimated retail
    Drew One Piece Swimsuit (view 2)Drew One Piece Swimsuit (view 1)
    View Product: Drew One Piece Swimsuit

    Drew

    One Piece Swimsuit
    Size 28 Plus
    $48.99 $39.19 20% off with code THANKU
    67% off estimated retail
    Cider Swimsuit Top (view 2)Cider Swimsuit Top (view 1)
    View Product: Cider Swimsuit Top

    Cider

    Swimsuit Top
    Size 2X Plus
    $11.99 $9.59 20% off with code THANKU
    52% off estimated retail
    Old Navy Swimsuit Bottoms (view 2)Old Navy Swimsuit Bottoms (view 1)
    View Product: Old Navy Swimsuit Bottoms

    Old Navy

    Swimsuit Bottoms
    Size 2X Plus
    $17.99 $11.69 35% off with code THANKU
    28% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 2X Plus
    $16.99 $11.04 35% off with code THANKU
    32% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 2X Plus
    $12.99 $9.09 30% off with code THANKU
    48% off estimated retail
    Birdsong Swimsuit Top (view 2)Birdsong Swimsuit Top (view 1)New With Tags
    View Product: Birdsong Swimsuit Top

    Birdsong

    Swimsuit Top
    Size 2X Plus
    $24.99 $17.49 30% off with code THANKU
    75% off estimated retail
    Shein Swimsuit Top (view 2)Shein Swimsuit Top (view 1)
    View Product: Shein Swimsuit Top

    Shein

    Swimsuit Top
    Size 2X Plus
    $9.99 $7.49 25% off with code THANKU
    37% off estimated retail
    Peyton & Parker Swimsuit Bottoms (view 2)Peyton & Parker Swimsuit Bottoms (view 1)New With Tags
    View Product: Peyton & Parker Swimsuit Bottoms

    Peyton & Parker

    Swimsuit Bottoms
    Size 2X Plus
    $14.99 $10.49 30% off with code THANKU
    40% off estimated retail
    Peyton & Parker Swimsuit Bottoms (view 2)Peyton & Parker Swimsuit Bottoms (view 1)
    View Product: Peyton & Parker Swimsuit Bottoms

    Peyton & Parker

    Swimsuit Bottoms
    Size 2X Plus
    $11.99 $8.99 25% off with code THANKU
    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 2X Plus
    $14.99 $8.24 45% off with code THANKU
    60% off estimated retail
    Waterpro One Piece Swimsuit (view 2)Waterpro One Piece Swimsuit (view 1)
    View Product: Waterpro One Piece Swimsuit

    Waterpro

    One Piece Swimsuit
    Size 28 Plus
    $22.99 $16.09 30% off with code THANKU
    20% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 2X Plus
    $8.99 $6.74 25% off with code THANKU
    64% off estimated retail
    Old Navy One Piece Swimsuit (view 2)Old Navy One Piece Swimsuit (view 1)
    View Product: Old Navy One Piece Swimsuit

    Old Navy

    One Piece Swimsuit
    Size 2X Plus
    $25.99 $11.70 55% off with code THANKU
    42% off estimated retail
    Cupshe Swimsuit Top (view 2)Cupshe Swimsuit Top (view 1)Price Drop
    View Product: Cupshe Swimsuit Top

    Cupshe

    Swimsuit Top
    Size 2X Plus
    $12.99 $7.79 40% off with code THANKU
    31% off estimated retail
    Bravissimo Swimsuit Bottoms (view 2)Bravissimo Swimsuit Bottoms (view 1)
    View Product: Bravissimo Swimsuit Bottoms

    Bravissimo

    Swimsuit Bottoms
    Size 2X Plus
    $16.99 $8.50 50% off with code THANKU
    66% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)Price Drop
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 2X Plus
    $12.99 $7.14 45% off with code THANKU
    48% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)Price Drop
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 30 Plus
    $14.99 $9.74 35% off with code THANKU
    40% off estimated retail
    Assorted Brands Swimsuit Top (view 2)Assorted Brands Swimsuit Top (view 1)Price Drop
    View Product: Assorted Brands Swimsuit Top

    Assorted Brands

    Swimsuit Top
    Size 2X Plus
    $14.99 $7.50 50% off with code THANKU
    40% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)Price Drop
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 2X Plus
    $13.99 $7.00 50% off with code THANKU
    44% off estimated retail
    Parade Swimsuit Bottoms (view 2)Parade Swimsuit Bottoms (view 1)Price Drop
    View Product: Parade Swimsuit Bottoms

    Parade

    Swimsuit Bottoms
    Size 2X Plus
    $12.99 $8.44 35% off with code THANKU
    48% off estimated retail
    Hayden One Piece Swimsuit (view 2)Hayden One Piece Swimsuit (view 1)Price Drop
    View Product: Hayden One Piece Swimsuit

    Hayden

    One Piece Swimsuit
    Size 28 Plus
    $28.99 $14.50 50% off with code THANKU
    78% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)Price Drop
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 2X Plus
    $12.99 $7.14 45% off with code THANKU
    48% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)Price Drop
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 2X Plus
    $14.99 $7.50 50% off with code THANKU
    40% off estimated retail
    ZeroXposur Swimsuit Bottoms (view 2)ZeroXposur Swimsuit Bottoms (view 1)Price Drop
    View Product: ZeroXposur Swimsuit Bottoms

    ZeroXposur

    Swimsuit Bottoms
    Size 2X Plus
    $15.99 $11.19 30% off with code THANKU
    75% off estimated retail
    Shein One Piece Swimsuit (view 2)Shein One Piece Swimsuit (view 1)Price Drop
    View Product: Shein One Piece Swimsuit

    Shein

    One Piece Swimsuit
    Size 2X Plus
    $11.99 $7.79 35% off with code THANKU
    50% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)Price Drop
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 2X Plus
    $13.99 $7.00 50% off with code THANKU
    44% off estimated retail
    Rebdolls Swimsuit Bottoms (view 2)Rebdolls Swimsuit Bottoms (view 1)Price Drop
    View Product: Rebdolls Swimsuit Bottoms

    Rebdolls

    Swimsuit Bottoms
    Size 2X Plus
    $8.99 $6.74 25% off with code THANKU
    71% off estimated retail
    Shein Swimsuit Top (view 2)Shein Swimsuit Top (view 1)Price Drop
    View Product: Shein Swimsuit Top

    Shein

    Swimsuit Top
    Size 30 Plus
    $9.99 $7.49 25% off with code THANKU
    37% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)Price Drop
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 2X Plus
    $10.99 $6.59 40% off with code THANKU
    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 2X Plus
    $10.99 $6.59 40% off with code THANKU
    56% off estimated retail
    ASOS Swimsuit Top (view 2)ASOS Swimsuit Top (view 1)Price Drop
    View Product: ASOS Swimsuit Top

    ASOS

    Swimsuit Top
    Size 30 Plus
    $10.99 $8.24 25% off with code THANKU
    65% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)Price Drop
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 2X Plus
    $8.99 $6.29 30% off with code THANKU
    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 2X Plus
    $8.99 $6.74 25% off with code THANKU
    43% off estimated retail
    Cupshe Swimsuit Bottoms (view 2)Cupshe Swimsuit Bottoms (view 1)New With Tags
    View Product: Cupshe Swimsuit Bottoms

    Cupshe

    Swimsuit Bottoms
    Size 2X Plus
    $8.99 $6.29 30% off with code THANKU
    52% off estimated retail
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