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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.

3-6 moRemove filter
77 items
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    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 3-6 mo
    $11.99
    29% off estimated retail
    Gymboree One Piece Swimsuit (view 2)Gymboree One Piece Swimsuit (view 1)
    View Product: Gymboree One Piece Swimsuit

    Gymboree

    One Piece Swimsuit
    Size 3-6 mo
    $18.99
    29% 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 3-6 mo
    $7.99
    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 3-6 mo
    $14.99
    31% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    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 3-6 mo
    $8.99 $7.19 20% off with code SHINE
    50% off estimated retail
    Janie and Jack One Piece Swimsuit (view 2)Janie and Jack One Piece Swimsuit (view 1)
    View Product: Janie and Jack One Piece Swimsuit

    Janie and Jack

    One Piece Swimsuit
    Size 3-6 mo
    $10.99 $8.24 25% off with code SHINE
    73% off estimated retail
    Andy & Evan One Piece Swimsuit (view 2)Andy & Evan One Piece Swimsuit (view 1)
    View Product: Andy & Evan One Piece Swimsuit

    Andy & Evan

    One Piece Swimsuit
    Size 3-6 mo
    $14.99 $10.49 30% off with code SHINE
    72% off estimated retail
    Janie and Jack One Piece Swimsuit (view 2)Janie and Jack One Piece Swimsuit (view 1)
    View Product: Janie and Jack One Piece Swimsuit

    Janie and Jack

    One Piece Swimsuit
    Size 3-6 mo
    $18.99 $14.24 25% off with code SHINE
    54% 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 3-6 mo
    $5.99 $4.79 20% off with code SHINE
    77% off estimated retail
    Primary Clothing Rash Guard (view 2)Primary Clothing Rash Guard (view 1)
    View Product: Primary Clothing Rash Guard

    Primary Clothing

    Rash Guard
    Size 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    70% off estimated retail
    Funsies Wetsuit (view 2)Funsies Wetsuit (view 1)
    View Product: Funsies Wetsuit

    Funsies

    Wetsuit
    Size 3-6 mo
    $11.99 $9.59 20% off with code SHINE
    45% 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 3-6 mo
    $11.99 $9.59 20% off with code SHINE
    33% off estimated retail
    Gymboree One Piece Swimsuit (view 2)Gymboree One Piece Swimsuit (view 1)
    View Product: Gymboree One Piece Swimsuit

    Gymboree

    One Piece Swimsuit
    Size 3-6 mo
    $16.99 $13.59 20% off with code SHINE
    37% off estimated retail
    Coolibar Wetsuit (view 2)Coolibar Wetsuit (view 1)
    View Product: Coolibar Wetsuit

    Coolibar

    Wetsuit
    Size 3-6 mo
    $23.99 $17.99 25% off with code SHINE
    63% off estimated retail
    Andy & Evan Rash Guard (view 2)Andy & Evan Rash Guard (view 1)
    View Product: Andy & Evan Rash Guard

    Andy & Evan

    Rash Guard
    Size 3-6 mo
    $17.99 $13.49 25% off with code SHINE
    67% off estimated retail
    Hope & Henry One Piece Swimsuit (view 2)Hope & Henry One Piece Swimsuit (view 1)
    View Product: Hope & Henry One Piece Swimsuit

    Hope & Henry

    One Piece Swimsuit
    Size 3-6 mo
    $11.99 $9.59 20% off with code SHINE
    45% off estimated retail
    Tea One Piece Swimsuit (view 2)Tea One Piece Swimsuit (view 1)
    View Product: Tea One Piece Swimsuit

    Tea

    One Piece Swimsuit
    Size 3-6 mo
    $20.99 $15.74 25% off with code SHINE
    56% off estimated retail
    H&M One Piece Swimsuit (view 2)H&M One Piece Swimsuit (view 1)
    View Product: H&M One Piece Swimsuit

    H&M

    One Piece Swimsuit
    Size 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    42% 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 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    27% 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 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    27% 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 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    27% 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 3-6 mo
    $10.99 $8.79 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 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    27% 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 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    27% off estimated retail
    Joe Fresh One Piece Swimsuit (view 2)Joe Fresh One Piece Swimsuit (view 1)
    View Product: Joe Fresh One Piece Swimsuit

    Joe Fresh

    One Piece Swimsuit
    Size 3-6 mo
    $5.99 $4.79 20% off with code SHINE
    62% off estimated retail
    Gymboree One Piece Swimsuit (view 2)Gymboree One Piece Swimsuit (view 1)
    View Product: Gymboree One Piece Swimsuit

    Gymboree

    One Piece Swimsuit
    Size 3-6 mo
    $18.99 $14.24 25% off with code SHINE
    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 3-6 mo
    $13.99 $11.19 20% off with code SHINE
    36% 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 3-6 mo
    $8.99 $7.19 20% off with code SHINE
    18% 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 3-6 mo
    $5.99 $4.79 20% off with code SHINE
    45% off estimated retail
    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 3-6 mo
    $6.99 $5.59 20% off with code SHINE
    36% 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 3-6 mo
    $9.99 $7.99 20% off with code SHINE
    $11
    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size 3-6 mo
    $11.99 $9.59 20% off with code SHINE
    45% off estimated retail
    Hanna Andersson Rash Guard (view 2)Hanna Andersson Rash Guard (view 1)
    View Product: Hanna Andersson Rash Guard

    Hanna Andersson

    Rash Guard
    Size 3-6 mo
    $24.99 $14.99 40% off with code SHINE
    39% 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 3-6 mo
    $9.99 $7.99 20% off with code SHINE
    54% off estimated retail
    Gymboree One Piece Swimsuit (view 2)Gymboree One Piece Swimsuit (view 1)
    View Product: Gymboree One Piece Swimsuit

    Gymboree

    One Piece Swimsuit
    Size 3-6 mo
    $18.99 $14.24 25% off with code SHINE
    29% 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 3-6 mo
    $9.99 $7.99 20% off with code SHINE
    $11
    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 3-6 mo
    $10.99 $8.79 20% off with code SHINE
    63% off estimated retail
    Carter's Two Piece Swimsuit (view 2)Carter's Two Piece Swimsuit (view 1)
    View Product: Carter's Two Piece Swimsuit

    Carter's

    Two Piece Swimsuit
    Size 3-6 mo
    $11.99 $9.59 20% off with code SHINE
    60% 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 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    27% off estimated retail
    Carter's Two Piece Swimsuit (view 2)Carter's Two Piece Swimsuit (view 1)Price Drop
    View Product: Carter's Two Piece Swimsuit

    Carter's

    Two Piece Swimsuit
    Size 3-6 mo
    $10.99 $8.79 20% off with code SHINE
    63% off estimated retail
    H&M Two Piece Swimsuit (view 2)H&M Two Piece Swimsuit (view 1)Price Drop
    View Product: H&M Two Piece Swimsuit

    H&M

    Two Piece Swimsuit
    Size 3-6 mo
    $10.99 $8.79 20% off with code SHINE
    31% off estimated retail
    Janie and Jack One Piece Swimsuit (view 2)Janie and Jack One Piece Swimsuit (view 1)
    View Product: Janie and Jack One Piece Swimsuit

    Janie and Jack

    One Piece Swimsuit
    Size 3-6 mo
    $13.99 $10.49 25% off with code SHINE
    66% 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 3-6 mo
    $10.99 $8.79 20% off with code SHINE
    38% 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 3-6 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 3-6 mo
    $11.99 $9.59 20% off with code SHINE
    29% 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 3-6 mo
    $9.99 $7.99 20% off with code SHINE
    44% off estimated retail
    Carter's Two Piece Swimsuit (view 2)Carter's Two Piece Swimsuit (view 1)Price Drop
    View Product: Carter's Two Piece Swimsuit

    Carter's

    Two Piece Swimsuit
    Size 3-6 mo
    $10.99 $8.79 20% off with code SHINE
    63% off estimated retail
    Carter's Rash Guard (view 2)Carter's Rash Guard (view 1)
    View Product: Carter's Rash Guard

    Carter's

    Rash Guard
    Size 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    69% off estimated retail
    The Honest Co. Rash Guard (view 2)The Honest Co. Rash Guard (view 1)New With Tags
    View Product: The Honest Co. Rash Guard

    The Honest Co.

    Rash Guard
    Size 3-6 mo
    $11.99 $9.59 20% off with code SHINE
    45% 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 3-6 mo
    $8.99 $7.19 20% off with code SHINE
    66% 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 3-6 mo
    $9.99 $7.99 20% off with code SHINE
    63% 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 3-6 mo
    $8.99 $7.19 20% off with code SHINE
    50% 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 3-6 mo
    $8.99 $7.19 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 3-6 mo
    $9.99 $7.99 20% off with code SHINE
    54% 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 3-6 mo
    $9.99 $7.99 20% off with code SHINE
    41% 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 3-6 mo
    $9.99 $7.99 20% off with code SHINE
    41% off estimated retail
    Cat & Jack Rash Guard (view 2)Cat & Jack Rash Guard (view 1)Price Drop
    View Product: Cat & Jack Rash Guard

    Cat & Jack

    Rash Guard
    Size 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    60% 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 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    53% 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 3-6 mo
    $8.99 $7.19 20% off with code SHINE
    50% off estimated retail
    Gymboree One Piece Swimsuit (view 2)Gymboree One Piece Swimsuit (view 1)Price Drop
    View Product: Gymboree One Piece Swimsuit

    Gymboree

    One Piece Swimsuit
    Size 3-6 mo
    $9.99 $7.99 20% off with code SHINE
    63% off estimated retail
    Janie and Jack Rash Guard (view 2)Janie and Jack Rash Guard (view 1)Price Drop
    View Product: Janie and Jack Rash Guard

    Janie and Jack

    Rash Guard
    Size 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    74% off estimated retail
    Janie and Jack Rash Guard (view 2)Janie and Jack Rash Guard (view 1)Price Drop
    View Product: Janie and Jack Rash Guard

    Janie and Jack

    Rash Guard
    Size 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    74% 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 3-6 mo
    $8.99 $7.19 20% off with code SHINE
    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 3-6 mo
    $8.99 $7.19 20% off with code SHINE
    59% 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 3-6 mo
    $8.99 $7.19 20% off with code SHINE
    59% off estimated retail
    Butter Swimsuit Cover Up (view 2)Butter Swimsuit Cover Up (view 1)Price Drop
    View Product: Butter Swimsuit Cover Up

    Butter

    Swimsuit Cover Up
    Size 3-6 mo
    $8.99 $7.19 20% off with code SHINE
    72% 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 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    55% off estimated retail
    Helix Two Piece Swimsuit (view 2)Helix Two Piece Swimsuit (view 1)Price Drop
    View Product: Helix Two Piece Swimsuit

    Helix

    Two Piece Swimsuit
    Size 3-6 mo
    $8.99 $7.19 20% off with code SHINE
    59% off estimated retail
    Janie and Jack Rash Guard (view 2)Janie and Jack Rash Guard (view 1)Price Drop
    View Product: Janie and Jack Rash Guard

    Janie and Jack

    Rash Guard
    Size 3-6 mo
    $8.99 $7.19 20% off with code SHINE
    71% off estimated retail
    Gymboree One Piece Swimsuit (view 2)Gymboree One Piece Swimsuit (view 1)Price Drop
    View Product: Gymboree One Piece Swimsuit

    Gymboree

    One Piece Swimsuit
    Size 3-6 mo
    $8.99 $7.19 20% off with code SHINE
    64% 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 3-6 mo
    $6.99 $5.59 20% off with code SHINE
    75% 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 3-6 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 3-6 mo
    $6.99 $5.59 20% off with code SHINE
    65% off estimated retail
    Baby Gap One Piece Swimsuit (view 2)Baby Gap One Piece Swimsuit (view 1)Price Drop
    View Product: Baby Gap One Piece Swimsuit

    Baby Gap

    One Piece Swimsuit
    Size 3-6 mo
    $6.99 $5.59 20% off with code SHINE
    72% 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 3-6 mo
    $6.99 $5.59 20% off with code SHINE
    58% 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 3-6 mo
    $8.99 $7.19 20% off with code SHINE
    47% 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 3-6 mo
    $7.99 $6.39 20% off with code SHINE
    60% off estimated retail
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