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Find girls' one pieces at up to 90% off estimated retail prices when you shop at thredUP. Get pre-loved items from your favorite girls' brands, like Baby Gap and Carter's.

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61 items
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    Athleta One Piece Swimsuit (view 2)Athleta One Piece Swimsuit (view 1)
    View Product: Athleta One Piece Swimsuit

    Athleta

    One Piece Swimsuit
    Size 16
    $23.99
    51% 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
    $12.99
    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 8
    $13.99
    57% off estimated retail
    LoveShackFancy One Piece Swimsuit (view 2)LoveShackFancy One Piece Swimsuit (view 1)
    View Product: LoveShackFancy One Piece Swimsuit

    LoveShackFancy

    One Piece Swimsuit
    Size 2T
    $21.99
    78% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    LoveShackFancy One Piece Swimsuit (view 2)LoveShackFancy One Piece Swimsuit (view 1)
    View Product: LoveShackFancy One Piece Swimsuit

    LoveShackFancy

    One Piece Swimsuit
    Size 4
    $73.99
    62% off estimated retail
    PixieLane One Piece Swimsuit (view 2)PixieLane One Piece Swimsuit (view 1)
    View Product: PixieLane One Piece Swimsuit

    PixieLane

    One Piece Swimsuit
    Size 4
    $15.99
    40% 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 7
    $15.99
    23% off estimated retail
    More Than Magic One Piece Swimsuit (view 2)More Than Magic One Piece Swimsuit (view 1)
    View Product: More Than Magic One Piece Swimsuit

    More Than Magic

    One Piece Swimsuit
    Size Medium kids
    $11.99
    14% 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 Large kids
    $15.99
    51% 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 10
    $12.99
    23% off estimated retail
    Athleta One Piece Swimsuit (view 2)Athleta One Piece Swimsuit (view 1)
    View Product: Athleta One Piece Swimsuit

    Athleta

    One Piece Swimsuit
    Size 7
    $26.99
    53% off estimated retail
    The Beaufort Bonnet Company One Piece Swimsuit (view 2)The Beaufort Bonnet Company One Piece Swimsuit (view 1)
    View Product: The Beaufort Bonnet Company One Piece Swimsuit

    The Beaufort Bonnet Company

    One Piece Swimsuit
    Size 6-12 mo
    $26.99
    60% off estimated retail
    Harry Potter One Piece Swimsuit (view 2)Harry Potter One Piece Swimsuit (view 1)
    View Product: Harry Potter One Piece Swimsuit

    Harry Potter

    One Piece Swimsuit
    Size 9
    $9.99
    43% off estimated retail
    TYR One Piece Swimsuit (view 2)TYR One Piece Swimsuit (view 1)New With Tags
    View Product: TYR One Piece Swimsuit

    TYR

    One Piece Swimsuit
    Size 20
    $33.99
    60% off estimated retail
    BMG One Piece Swimsuit (view 2)BMG One Piece Swimsuit (view 1)
    View Product: BMG One Piece Swimsuit

    BMG

    One Piece Swimsuit
    Size 6
    $21.99 $16.49 25% off with code HOTDEAL
    39% 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 4
    $24.99 $18.74 25% off with code HOTDEAL
    44% 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 6X
    $12.99 $10.39 20% off with code HOTDEAL
    63% off estimated retail
    Tucker + Tate One Piece Swimsuit (view 2)Tucker + Tate One Piece Swimsuit (view 1)
    View Product: Tucker + Tate One Piece Swimsuit

    Tucker + Tate

    One Piece Swimsuit
    Size 3
    $16.99 $13.59 20% off with code HOTDEAL
    58% off estimated retail
    Tucker + Tate One Piece Swimsuit (view 2)Tucker + Tate One Piece Swimsuit (view 1)
    View Product: Tucker + Tate One Piece Swimsuit

    Tucker + Tate

    One Piece Swimsuit
    Size 2
    $13.99 $11.19 20% off with code HOTDEAL
    55% off estimated retail
    Capezio One Piece Swimsuit (view 2)Capezio One Piece Swimsuit (view 1)
    View Product: Capezio One Piece Swimsuit

    Capezio

    One Piece Swimsuit
    Size Large youth
    $11.99 $9.59 20% off with code HOTDEAL
    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 100 cm
    $13.99 $10.49 25% off with code HOTDEAL
    51% off estimated retail
    Shade Critters One Piece Swimsuit (view 2)Shade Critters One Piece Swimsuit (view 1)
    View Product: Shade Critters One Piece Swimsuit

    Shade Critters

    One Piece Swimsuit
    Size 2T
    $20.99 $15.74 25% off with code HOTDEAL
    61% off estimated retail
    Freestyle By Danskin One Piece Swimsuit (view 2)Freestyle By Danskin One Piece Swimsuit (view 1)
    View Product: Freestyle By Danskin One Piece Swimsuit

    Freestyle By Danskin

    One Piece Swimsuit
    Size 4
    $11.99 $9.59 20% off with code HOTDEAL
    21% off estimated retail
    Speedo One Piece Swimsuit (view 2)Speedo One Piece Swimsuit (view 1)
    View Product: Speedo One Piece Swimsuit

    Speedo

    One Piece Swimsuit
    Size 6
    $13.99 $10.49 25% off with code HOTDEAL
    48% off estimated retail
    Justice One Piece Swimsuit (view 2)Justice One Piece Swimsuit (view 1)
    View Product: Justice One Piece Swimsuit

    Justice

    One Piece Swimsuit
    Size 5
    $26.99 $17.54 35% off with code HOTDEAL
    37% off estimated retail
    The Children's Place One Piece Swimsuit (view 2)The Children's Place One Piece Swimsuit (view 1)
    View Product: The Children's Place One Piece Swimsuit

    The Children's Place

    One Piece Swimsuit
    Size 18-24 mo
    $8.99 $7.19 20% off with code HOTDEAL
    55% off estimated retail
    Mirella One Piece Swimsuit (view 2)Mirella One Piece Swimsuit (view 1)
    View Product: Mirella One Piece Swimsuit

    Mirella

    One Piece Swimsuit
    Size 8
    $16.99 $13.59 20% off with code HOTDEAL
    61% off estimated retail
    Baby Gap One Piece Swimsuit (view 2)Baby Gap One Piece Swimsuit (view 1)
    View Product: Baby Gap One Piece Swimsuit

    Baby Gap

    One Piece Swimsuit
    Size 2T
    $10.99 $8.79 20% off with code HOTDEAL
    66% off estimated retail
    YMI One Piece Swimsuit (view 2)YMI One Piece Swimsuit (view 1)
    View Product: YMI One Piece Swimsuit

    YMI

    One Piece Swimsuit
    Size 10
    $10.99 $8.79 20% off with code HOTDEAL
    37% off estimated retail
    Abercrombie One Piece Swimsuit (view 2)Abercrombie One Piece Swimsuit (view 1)
    View Product: Abercrombie One Piece Swimsuit

    Abercrombie

    One Piece Swimsuit
    Size 7
    $15.99 $11.99 25% off with code HOTDEAL
    64% off estimated retail
    Terez One Piece Swimsuit (view 2)Terez One Piece Swimsuit (view 1)
    View Product: Terez One Piece Swimsuit

    Terez

    One Piece Swimsuit
    Size 12
    $25.99 $18.19 30% off with code HOTDEAL
    74% 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 2T
    $18.99 $13.29 30% off with code HOTDEAL
    55% off estimated retail
    Art Class One Piece Swimsuit (view 2)Art Class One Piece Swimsuit (view 1)
    View Product: Art Class One Piece Swimsuit

    Art Class

    One Piece Swimsuit
    Size Medium kids
    $13.99 $11.19 20% off with code HOTDEAL
    29% 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 6X
    $10.99 $8.79 20% off with code HOTDEAL
    66% off estimated retail
    Speedo One Piece Swimsuit (view 2)Speedo One Piece Swimsuit (view 1)New With Tags
    View Product: Speedo One Piece Swimsuit

    Speedo

    One Piece Swimsuit
    Size X-Large youth
    $20.99 $14.69 30% off with code HOTDEAL
    24% 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 18 mo
    $10.99 $8.79 20% off with code HOTDEAL
    54% 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 X-Small tots
    $12.99 $10.39 20% off with code HOTDEAL
    35% off estimated retail
    Nike One Piece Swimsuit (view 2)Nike One Piece Swimsuit (view 1)Price Drop
    View Product: Nike One Piece Swimsuit

    Nike

    One Piece Swimsuit
    Size 2
    $14.99 $11.99 20% off with code HOTDEAL
    66% 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 X-Large tots
    $15.99 $12.79 20% off with code HOTDEAL
    44% 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 6-12 mo
    $12.99 $10.39 20% off with code HOTDEAL
    45% off estimated retail
    SO One Piece Swimsuit (view 2)SO One Piece Swimsuit (view 1)Price Drop
    View Product: SO One Piece Swimsuit

    SO

    One Piece Swimsuit
    Size 6
    $15.99 $10.39 35% off with code HOTDEAL
    40% off estimated retail
    Old Navy One Piece Swimsuit (view 2)Old Navy One Piece Swimsuit (view 1)Price Drop
    View Product: Old Navy One Piece Swimsuit

    Old Navy

    One Piece Swimsuit
    Size 12-18 mo
    $8.99 $5.84 35% off with code HOTDEAL
    55% off estimated retail
    Egg by Susan Lazar One Piece Swimsuit (view 2)Egg by Susan Lazar One Piece Swimsuit (view 1)Price Drop
    View Product: Egg by Susan Lazar One Piece Swimsuit

    Egg by Susan Lazar

    One Piece Swimsuit
    Size 12 mo
    $20.99 $12.59 40% off with code HOTDEAL
    22% 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 12
    $15.99 $10.39 35% off with code HOTDEAL
    57% off estimated retail
    Les Tout Petits One Piece Swimsuit (view 2)Les Tout Petits One Piece Swimsuit (view 1)Price Drop
    View Product: Les Tout Petits One Piece Swimsuit

    Les Tout Petits

    One Piece Swimsuit
    Size 2
    $16.99 $9.34 45% off with code HOTDEAL
    76% 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 X-Large kids
    $14.99 $8.99 40% off with code HOTDEAL
    60% off estimated retail
    Crewcuts One Piece Swimsuit (view 2)Crewcuts One Piece Swimsuit (view 1)Price Drop
    View Product: Crewcuts One Piece Swimsuit

    Crewcuts

    One Piece Swimsuit
    Size 2
    $12.99 $7.79 40% off with code HOTDEAL
    66% 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
    $8.99 $5.39 40% off with code HOTDEAL
    73% off estimated retail
    Hatley One Piece Swimsuit (view 2)Hatley One Piece Swimsuit (view 1)Price Drop
    View Product: Hatley One Piece Swimsuit

    Hatley

    One Piece Swimsuit
    Size 3 mo
    $12.99 $7.79 40% off with code HOTDEAL
    59% off estimated retail
    Snowflake Designs One Piece Swimsuit (view 2)Snowflake Designs One Piece Swimsuit (view 1)Price Drop
    View Product: Snowflake Designs One Piece Swimsuit

    Snowflake Designs

    One Piece Swimsuit
    Size Small kids
    $16.99 $10.19 40% off with code HOTDEAL
    61% off estimated retail
    Art Class One Piece Swimsuit (view 2)Art Class One Piece Swimsuit (view 1)Price Drop
    View Product: Art Class One Piece Swimsuit

    Art Class

    One Piece Swimsuit
    Size Small infants
    $8.99 $5.39 40% off with code HOTDEAL
    42% off estimated retail
    OshKosh B'gosh One Piece Swimsuit (view 2)OshKosh B'gosh One Piece Swimsuit (view 1)Price Drop
    View Product: OshKosh B'gosh One Piece Swimsuit

    OshKosh B'gosh

    One Piece Swimsuit
    Size 18 mo
    $11.99 $7.19 40% off with code HOTDEAL
    58% off estimated retail
    Beau Loves One Piece Swimsuit (view 2)Beau Loves One Piece Swimsuit (view 1)Price Drop
    View Product: Beau Loves One Piece Swimsuit

    Beau Loves

    One Piece Swimsuit
    Size 2
    $13.99 $8.39 40% off with code HOTDEAL
    66% off estimated retail
    Pehr One Piece Swimsuit (view 2)Pehr One Piece Swimsuit (view 1)New With Tags
    View Product: Pehr One Piece Swimsuit

    Pehr

    One Piece Swimsuit
    Size 12 mo
    $11.99 $7.19 40% off with code HOTDEAL
    59% 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 12-18 mo
    $11.24 $6.74 40% off with code HOTDEAL
    59% 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 18 mo
    $11.24 $6.74 40% off with code HOTDEAL
    54% 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 24 mo
    $13.24 $7.94 40% off with code HOTDEAL
    72% off estimated retail
    Gap One Piece Swimsuit (view 2)Gap One Piece Swimsuit (view 1)Price Drop
    View Product: Gap One Piece Swimsuit

    Gap

    One Piece Swimsuit
    Size 50 cm
    $11.24 $6.74 40% off with code HOTDEAL
    66% 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 0-3 mo
    $11.24 $6.74 40% off with code HOTDEAL
    55% 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 12-18 mo
    $10.24 $6.14 40% off with code HOTDEAL
    65% 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 12 mo
    $11.24 $6.74 40% off with code HOTDEAL
    73% off estimated retail
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