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Whether it's for summertime or swimming lessons, your girls need the right gear for when they dive into the water. Check out thredUP's selection of girls' swimwear to discover items from top brands at up to 90% off estimated retail.

6-9 moRemove filter
49 items
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    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size 6-9 mo
    $11.99
    45% off estimated retail
    Primary Clothing One Piece Swimsuit (view 2)Primary Clothing One Piece Swimsuit (view 1)
    View Product: Primary Clothing One Piece Swimsuit

    Primary Clothing

    One Piece Swimsuit
    Size 6-9 mo
    $9.99
    63% off estimated retail
    Mudpie Baby One Piece Swimsuit (view 2)Mudpie Baby One Piece Swimsuit (view 1)
    View Product: Mudpie Baby One Piece Swimsuit

    Mudpie Baby

    One Piece Swimsuit
    Size 6-9 mo
    $34.99 $24.49 30% off with code SHINE
    46% off estimated retail
    Carter's One Piece Swimsuit (view 2)Carter's One Piece Swimsuit (view 1)
    View Product: Carter's One Piece Swimsuit

    Carter's

    One Piece Swimsuit
    Size 6-9 mo
    $10.99 $8.79 20% off with code SHINE
    63% 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 6-9 mo
    $14.99 $11.24 25% off with code SHINE
    54% off estimated retail
    First Impressions Rash Guard (view 2)First Impressions Rash Guard (view 1)
    View Product: First Impressions Rash Guard

    First Impressions

    Rash Guard
    Size 6-9 mo
    $13.99 $11.19 20% off with code SHINE
    48% off estimated retail
    Little Me Wetsuit (view 2)Little Me Wetsuit (view 1)
    View Product: Little Me Wetsuit

    Little Me

    Wetsuit
    Size 6-9 mo
    $15.99 $12.79 20% off with code SHINE
    51% off estimated retail
    Baby Boden One Piece Swimsuit (view 2)Baby Boden One Piece Swimsuit (view 1)
    View Product: Baby Boden One Piece Swimsuit

    Baby Boden

    One Piece Swimsuit
    Size 6-9 mo
    $13.99 $10.49 25% off with code SHINE
    48% off estimated retail
    Wonder Nation One Piece Swimsuit (view 2)Wonder Nation One Piece Swimsuit (view 1)New With Tags
    View Product: Wonder Nation One Piece Swimsuit

    Wonder Nation

    One Piece Swimsuit
    Size 6-9 mo
    $9.99 $7.99 20% off with code SHINE
    $11
    Wonder Nation One Piece Swimsuit (view 2)Wonder Nation One Piece Swimsuit (view 1)New With Tags
    View Product: Wonder Nation One Piece Swimsuit

    Wonder Nation

    One Piece Swimsuit
    Size 6-9 mo
    $9.99 $7.99 20% off with code SHINE
    $11
    Wonder Nation Rash Guard (view 2)Wonder Nation Rash Guard (view 1)New With Tags
    View Product: Wonder Nation Rash Guard

    Wonder Nation

    Rash Guard
    Size 6-9 mo
    $7.99 $6.39 20% off with code SHINE
    27% off estimated retail
    Wonder Nation Rash Guard (view 2)Wonder Nation Rash Guard (view 1)New With Tags
    View Product: Wonder Nation Rash Guard

    Wonder Nation

    Rash Guard
    Size 6-9 mo
    $7.99 $6.39 20% off with code SHINE
    27% off estimated retail
    PatPat One Piece Swimsuit (view 2)PatPat One Piece Swimsuit (view 1)
    View Product: PatPat One Piece Swimsuit

    PatPat

    One Piece Swimsuit
    Size 6-9 mo
    $8.99 $7.19 20% off with code SHINE
    18% 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 6-9 mo
    $11.99 $9.59 20% off with code SHINE
    45% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 6-9 mo
    $8.99 $7.19 20% off with code SHINE
    47% off estimated retail
    Wonder Nation One Piece Swimsuit (view 2)Wonder Nation One Piece Swimsuit (view 1)
    View Product: Wonder Nation One Piece Swimsuit

    Wonder Nation

    One Piece Swimsuit
    Size 6-9 mo
    $9.99 $7.99 20% off with code SHINE
    $11
    Wonder Nation One Piece Swimsuit (view 2)Wonder Nation One Piece Swimsuit (view 1)
    View Product: Wonder Nation One Piece Swimsuit

    Wonder Nation

    One Piece Swimsuit
    Size 6-9 mo
    $10.99 $8.79 20% off with code SHINE
    $11
    Wonder Nation Two Piece Swimsuit (view 2)Wonder Nation Two Piece Swimsuit (view 1)
    View Product: Wonder Nation Two Piece Swimsuit

    Wonder Nation

    Two Piece Swimsuit
    Size 6-9 mo
    $9.99 $7.99 20% off with code SHINE
    $11
    Starting Out Board Shorts (view 2)Starting Out Board Shorts (view 1)
    View Product: Starting Out Board Shorts

    Starting Out

    Board Shorts
    Size 6-9 mo
    $5.99 $4.79 20% off with code SHINE
    14% off estimated retail
    Wonder Nation One Piece Swimsuit (view 2)Wonder Nation One Piece Swimsuit (view 1)
    View Product: Wonder Nation One Piece Swimsuit

    Wonder Nation

    One Piece Swimsuit
    Size 6-9 mo
    $9.99 $7.99 20% off with code SHINE
    $11
    Wonder Nation Two Piece Swimsuit (view 2)Wonder Nation Two Piece Swimsuit (view 1)
    View Product: Wonder Nation Two Piece Swimsuit

    Wonder Nation

    Two Piece Swimsuit
    Size 6-9 mo
    $6.99 $5.59 20% off with code SHINE
    36% 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 6-9 mo
    $9.99 $7.99 20% off with code SHINE
    54% off estimated retail
    Wonder Nation One Piece Swimsuit (view 2)Wonder Nation One Piece Swimsuit (view 1)Price Drop
    View Product: Wonder Nation One Piece Swimsuit

    Wonder Nation

    One Piece Swimsuit
    Size 6-9 mo
    $5.99 $4.79 20% off with code SHINE
    45% 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 6-9 mo
    $11.99 $9.59 20% off with code SHINE
    45% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)Price Drop
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 6-9 mo
    $9.99 $7.99 20% off with code SHINE
    41% off estimated retail
    Carter's One Piece Swimsuit (view 2)Carter's One Piece Swimsuit (view 1)
    View Product: Carter's One Piece Swimsuit

    Carter's

    One Piece Swimsuit
    Size 6-9 mo
    $10.99 $8.79 20% off with code SHINE
    63% off estimated retail
    Koala Kids One Piece Swimsuit (view 2)Koala Kids One Piece Swimsuit (view 1)
    View Product: Koala Kids One Piece Swimsuit

    Koala Kids

    One Piece Swimsuit
    Size 6-9 mo
    $7.99 $6.39 20% off with code SHINE
    27% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 6-9 mo
    $10.99 $8.79 20% off with code SHINE
    35% 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 6-9 mo
    $13.99 $11.19 20% off with code SHINE
    36% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)Price Drop
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 6-9 mo
    $11.99 $9.59 20% off with code SHINE
    29% off estimated retail
    Carter's One Piece Swimsuit (view 2)Carter's One Piece Swimsuit (view 1)
    View Product: Carter's One Piece Swimsuit

    Carter's

    One Piece Swimsuit
    Size 6-9 mo
    $7.99 $6.39 20% off with code SHINE
    73% off estimated retail
    Circo One Piece Swimsuit (view 2)Circo One Piece Swimsuit (view 1)Price Drop
    View Product: Circo One Piece Swimsuit

    Circo

    One Piece Swimsuit
    Size 6-9 mo
    $8.99 $7.19 20% off with code SHINE
    35% off estimated retail
    Little Me Rash Guard (view 2)Little Me Rash Guard (view 1)Price Drop
    View Product: Little Me Rash Guard

    Little Me

    Rash Guard
    Size 6-9 mo
    $6.99 $5.59 20% off with code SHINE
    56% off estimated retail
    Bob Der Bar One Piece Swimsuit (view 2)Bob Der Bar One Piece Swimsuit (view 1)Price Drop
    View Product: Bob Der Bar One Piece Swimsuit

    Bob Der Bar

    One Piece Swimsuit
    Size 6-9 mo
    $7.99 $6.39 20% off with code SHINE
    27% off estimated retail
    Koala Baby Wetsuit (view 2)Koala Baby Wetsuit (view 1)Price Drop
    View Product: Koala Baby Wetsuit

    Koala Baby

    Wetsuit
    Size 6-9 mo
    $10.99 $8.79 20% off with code SHINE
    50% off estimated retail
    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)Price Drop
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size 6-9 mo
    $9.99 $7.99 20% off with code SHINE
    54% off estimated retail
    Wonder Nation One Piece Swimsuit (view 2)Wonder Nation One Piece Swimsuit (view 1)Price Drop
    View Product: Wonder Nation One Piece Swimsuit

    Wonder Nation

    One Piece Swimsuit
    Size 6-9 mo
    $7.99 $6.39 20% off with code SHINE
    27% 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 6-9 mo
    $9.99 $7.99 20% off with code SHINE
    54% off estimated retail
    Sol Swim One Piece Swimsuit (view 2)Sol Swim One Piece Swimsuit (view 1)Price Drop
    View Product: Sol Swim One Piece Swimsuit

    Sol Swim

    One Piece Swimsuit
    Size 6-9 mo
    $8.99 $7.19 20% off with code SHINE
    59% off estimated retail
    Carter's One Piece Swimsuit (view 2)Carter's One Piece Swimsuit (view 1)Price Drop
    View Product: Carter's One Piece Swimsuit

    Carter's

    One Piece Swimsuit
    Size 6-9 mo
    $9.99 $7.99 20% off with code SHINE
    66% off estimated retail
    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)Price Drop
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size 6-9 mo
    $8.99 $7.19 20% off with code SHINE
    59% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)Price Drop
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 6-9 mo
    $8.99 $7.19 20% off with code SHINE
    47% off estimated retail
    Carter's Rash Guard (view 2)Carter's Rash Guard (view 1)Price Drop
    View Product: Carter's Rash Guard

    Carter's

    Rash Guard
    Size 6-9 mo
    $8.99 $7.19 20% off with code SHINE
    65% off estimated retail
    Carter's Rash Guard (view 2)Carter's Rash Guard (view 1)Price Drop
    View Product: Carter's Rash Guard

    Carter's

    Rash Guard
    Size 6-9 mo
    $8.99 $7.19 20% off with code SHINE
    62% 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 6-9 mo
    $6.99 $5.59 20% off with code SHINE
    65% 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 6-9 mo
    $7.99 $6.39 20% off with code SHINE
    60% off estimated retail
    Carter's One Piece Swimsuit (view 2)Carter's One Piece Swimsuit (view 1)Price Drop
    View Product: Carter's One Piece Swimsuit

    Carter's

    One Piece Swimsuit
    Size 6-9 mo
    $7.99 $6.39 20% off with code SHINE
    71% off estimated retail
    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)Price Drop
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size 6-9 mo
    $7.99 $6.39 20% off with code SHINE
    60% 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 6-9 mo
    $6.99 $5.59 20% off with code SHINE
    65% off estimated retail
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