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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.

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62 items
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    Cat & Jack Two Piece Swimsuit (view 2)Cat & Jack Two Piece Swimsuit (view 1)
    View Product: Cat & Jack Two Piece Swimsuit

    Cat & Jack

    Two Piece Swimsuit
    Size 7
    $10.99 $6.04 45% off with code GOBIG
    41% 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 3T
    $16.99 $9.34 45% off with code GOBIG
    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 7
    $14.99 $8.24 45% off with code GOBIG
    63% off estimated retail
    Cat & Jack Two Piece Swimsuit (view 2)Cat & Jack Two Piece Swimsuit (view 1)
    View Product: Cat & Jack Two Piece Swimsuit

    Cat & Jack

    Two Piece Swimsuit
    Size 3T
    $11.99 $6.59 45% off with code GOBIG
    35% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    SwimZip Rash Guard (view 2)SwimZip Rash Guard (view 1)
    View Product: SwimZip Rash Guard

    SwimZip

    Rash Guard
    Size 3T
    $18.99 $10.44 45% off with code GOBIG
    65% off estimated retail
    Cat & Jack Rash Guard (view 2)Cat & Jack Rash Guard (view 1)
    View Product: Cat & Jack Rash Guard

    Cat & Jack

    Rash Guard
    Size 3T
    $9.99 $5.49 45% off with code GOBIG
    16% 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 3T
    $16.99 $9.34 45% off with code GOBIG
    56% off estimated retail
    Vineyard Vines Two Piece Swimsuit (view 2)Vineyard Vines Two Piece Swimsuit (view 1)
    View Product: Vineyard Vines Two Piece Swimsuit

    Vineyard Vines

    Two Piece Swimsuit
    Size 3T
    $12.99 $7.14 45% off with code GOBIG
    61% off estimated retail
    Gap Two Piece Swimsuit (view 2)Gap Two Piece Swimsuit (view 1)
    View Product: Gap Two Piece Swimsuit

    Gap

    Two Piece Swimsuit
    Size 3T
    $13.99 $7.69 45% off with code GOBIG
    65% 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 7
    $20.99 $11.54 45% off with code GOBIG
    36% off estimated retail
    Breaking Waves One Piece Swimsuit (view 2)Breaking Waves One Piece Swimsuit (view 1)
    View Product: Breaking Waves One Piece Swimsuit

    Breaking Waves

    One Piece Swimsuit
    Size 3T
    $12.99 $7.14 45% off with code GOBIG
    41% 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 3T
    $21.99 $12.09 45% off with code GOBIG
    75% 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 3T
    $10.99 $6.04 45% off with code GOBIG
    41% off estimated retail
    KensieGirl One Piece Swimsuit (view 2)KensieGirl One Piece Swimsuit (view 1)
    View Product: KensieGirl One Piece Swimsuit

    KensieGirl

    One Piece Swimsuit
    Size 3T
    $12.99 $7.14 45% off with code GOBIG
    70% 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 3T
    $21.99 $12.09 45% off with code GOBIG
    75% 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 3T
    $14.99 $8.24 45% off with code GOBIG
    23% off estimated retail
    Ruffle Butts Rash Guard (view 2)Ruffle Butts Rash Guard (view 1)
    View Product: Ruffle Butts Rash Guard

    Ruffle Butts

    Rash Guard
    Size 3T
    $12.99 $7.14 45% off with code GOBIG
    $14
    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 7
    $12.99 $7.14 45% off with code GOBIG
    37% off estimated retail
    OshKosh B'gosh Rash Guard (view 2)OshKosh B'gosh Rash Guard (view 1)
    View Product: OshKosh B'gosh Rash Guard

    OshKosh B'gosh

    Rash Guard
    Size 7
    $15.99 $8.79 45% off with code GOBIG
    33% 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 3T
    $9.99 $5.49 45% off with code GOBIG
    41% off estimated retail
    Lands' End Board Shorts (view 2)Lands' End Board Shorts (view 1)
    View Product: Lands' End Board Shorts

    Lands' End

    Board Shorts
    Size 7
    $8.99 $4.94 45% off with code GOBIG
    59% off estimated retail
    Gymboree Two Piece Swimsuit (view 2)Gymboree Two Piece Swimsuit (view 1)
    View Product: Gymboree Two Piece Swimsuit

    Gymboree

    Two Piece Swimsuit
    Size 7
    $13.99 $7.69 45% off with code GOBIG
    48% 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
    $11.99 $6.59 45% off with code GOBIG
    29% 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 3T
    $9.99 $5.49 45% off with code GOBIG
    63% off estimated retail
    Shade Critters Rash Guard (view 2)Shade Critters Rash Guard (view 1)
    View Product: Shade Critters Rash Guard

    Shade Critters

    Rash Guard
    Size 3T
    $18.99 $10.44 45% off with code GOBIG
    65% off estimated retail
    Betsey Johnson Two Piece Swimsuit (view 2)Betsey Johnson Two Piece Swimsuit (view 1)
    View Product: Betsey Johnson Two Piece Swimsuit

    Betsey Johnson

    Two Piece Swimsuit
    Size 7
    $12.99 $7.14 45% off with code GOBIG
    70% 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 7
    $37.99 $20.89 45% off with code GOBIG
    55% off estimated retail
    Disney One Piece Swimsuit (view 2)Disney One Piece Swimsuit (view 1)
    View Product: Disney One Piece Swimsuit

    Disney

    One Piece Swimsuit
    Size 3T
    $11.99 $6.59 45% off with code GOBIG
    53% off estimated retail
    Kate Quinn Organics One Piece Swimsuit (view 2)Kate Quinn Organics One Piece Swimsuit (view 1)
    View Product: Kate Quinn Organics One Piece Swimsuit

    Kate Quinn Organics

    One Piece Swimsuit
    Size 3T
    $10.99 $6.04 45% off with code GOBIG
    59% off estimated retail
    Ruffle Butts Rash Guard (view 2)Ruffle Butts Rash Guard (view 1)
    View Product: Ruffle Butts Rash Guard

    Ruffle Butts

    Rash Guard
    Size 3T
    $8.99 $4.94 45% off with code GOBIG
    35% off estimated retail
    Gymboree Two Piece Swimsuit (view 2)Gymboree Two Piece Swimsuit (view 1)
    View Product: Gymboree Two Piece Swimsuit

    Gymboree

    Two Piece Swimsuit
    Size 7
    $18.99 $10.44 45% off with code GOBIG
    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 3T
    $18.99 $10.44 45% off with code GOBIG
    29% off estimated retail
    Hurley One Piece Swimsuit (view 2)Hurley One Piece Swimsuit (view 1)
    View Product: Hurley One Piece Swimsuit

    Hurley

    One Piece Swimsuit
    Size 7
    $13.99 $7.69 45% off with code GOBIG
    71% off estimated retail
    Hurley One Piece Swimsuit (view 2)Hurley One Piece Swimsuit (view 1)
    View Product: Hurley One Piece Swimsuit

    Hurley

    One Piece Swimsuit
    Size 3T
    $11.99 $6.59 45% off with code GOBIG
    70% off estimated retail
    UV Skinz Rash Guard (view 2)UV Skinz Rash Guard (view 1)
    View Product: UV Skinz Rash Guard

    UV Skinz

    Rash Guard
    Size 3T
    $14.99 $8.24 45% off with code GOBIG
    58% off estimated retail
    UV Skinz Rash Guard (view 2)UV Skinz Rash Guard (view 1)
    View Product: UV Skinz Rash Guard

    UV Skinz

    Rash Guard
    Size 3T
    $14.99 $8.24 45% off with code GOBIG
    55% 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 3T
    $9.99 $5.49 45% off with code GOBIG
    74% 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
    $9.99 $5.49 45% off with code GOBIG
    41% off estimated retail
    Lands' End Rash Guard (view 2)Lands' End Rash Guard (view 1)
    View Product: Lands' End Rash Guard

    Lands' End

    Rash Guard
    Size 7
    $26.99 $14.84 45% off with code GOBIG
    55% off estimated retail
    Polo by Ralph Lauren One Piece Swimsuit (view 2)Polo by Ralph Lauren One Piece Swimsuit (view 1)
    View Product: Polo by Ralph Lauren One Piece Swimsuit

    Polo by Ralph Lauren

    One Piece Swimsuit
    Size 3T
    $18.99 $10.44 45% off with code GOBIG
    67% off estimated retail
    Abercrombie Two Piece Swimsuit (view 2)Abercrombie Two Piece Swimsuit (view 1)
    View Product: Abercrombie Two Piece Swimsuit

    Abercrombie

    Two Piece Swimsuit
    Size 7
    $11.99 $6.59 45% off with code GOBIG
    67% 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 7
    $9.99 $5.49 45% off with code GOBIG
    66% 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
    $9.99 $5.49 45% off with code GOBIG
    41% 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 3T
    $18.99 $10.44 45% off with code GOBIG
    29% off estimated retail
    Penelope Mack One Piece Swimsuit (view 2)Penelope Mack One Piece Swimsuit (view 1)
    View Product: Penelope Mack One Piece Swimsuit

    Penelope Mack

    One Piece Swimsuit
    Size 3T
    $13.99 $7.69 45% off with code GOBIG
    48% off estimated retail
    Floatimini Rash Guard (view 2)Floatimini Rash Guard (view 1)
    View Product: Floatimini Rash Guard

    Floatimini

    Rash Guard
    Size 3T
    $19.99 $10.99 45% off with code GOBIG
    70% off estimated retail
    Kanu Surf Board Shorts (view 2)Kanu Surf Board Shorts (view 1)
    View Product: Kanu Surf Board Shorts

    Kanu Surf

    Board Shorts
    Size 3T
    $10.99 $6.04 45% off with code GOBIG
    50% off estimated retail
    Kanu Surf Board Shorts (view 2)Kanu Surf Board Shorts (view 1)
    View Product: Kanu Surf Board Shorts

    Kanu Surf

    Board Shorts
    Size 3T
    $10.99 $6.04 45% off with code GOBIG
    50% off estimated retail
    Kanu Surf Board Shorts (view 2)Kanu Surf Board Shorts (view 1)
    View Product: Kanu Surf Board Shorts

    Kanu Surf

    Board Shorts
    Size 3T
    $10.99 $6.04 45% off with code GOBIG
    50% 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 3T
    $11.99 $6.59 45% off with code GOBIG
    33% off estimated retail
    Tommy Bahama One Piece Swimsuit (view 2)Tommy Bahama One Piece Swimsuit (view 1)
    View Product: Tommy Bahama One Piece Swimsuit

    Tommy Bahama

    One Piece Swimsuit
    Size 7
    $16.99 $9.34 45% off with code GOBIG
    61% 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 7
    $11.99 $6.59 45% off with code GOBIG
    63% 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 3T
    $16.99 $9.34 45% off with code GOBIG
    75% off estimated retail
    Op Rash Guard (view 2)Op Rash Guard (view 1)Price Drop
    View Product: Op Rash Guard

    Op

    Rash Guard
    Size 3T
    $6.99 $3.84 45% off with code GOBIG
    57% off estimated retail
    Jessica Simpson One Piece Swimsuit (view 2)Jessica Simpson One Piece Swimsuit (view 1)
    View Product: Jessica Simpson One Piece Swimsuit

    Jessica Simpson

    One Piece Swimsuit
    Size 3T
    $12.99 $7.14 45% off with code GOBIG
    40% off estimated retail
    ZeroXposur One Piece Swimsuit (view 2)ZeroXposur One Piece Swimsuit (view 1)Price Drop
    View Product: ZeroXposur One Piece Swimsuit

    ZeroXposur

    One Piece Swimsuit
    Size 7
    $11.99 $6.59 45% off with code GOBIG
    70% off estimated retail
    Malibu Sugar Two Piece Swimsuit (view 2)Malibu Sugar Two Piece Swimsuit (view 1)Price Drop
    View Product: Malibu Sugar Two Piece Swimsuit

    Malibu Sugar

    Two Piece Swimsuit
    Size 7
    $10.99 $6.04 45% off with code GOBIG
    56% off estimated retail
    Roxy Two Piece Swimsuit (view 2)Roxy Two Piece Swimsuit (view 1)Price Drop
    View Product: Roxy Two Piece Swimsuit

    Roxy

    Two Piece Swimsuit
    Size 7
    $14.99 $8.24 45% off with code GOBIG
    65% off estimated retail
    Dolfin One Piece Swimsuit (view 2)Dolfin One Piece Swimsuit (view 1)Price Drop
    View Product: Dolfin One Piece Swimsuit

    Dolfin

    One Piece Swimsuit
    Size 3T
    $9.99 $5.49 45% off with code GOBIG
    50% off estimated retail
    Jantzen One Piece Swimsuit (view 2)Jantzen One Piece Swimsuit (view 1)Price Drop
    View Product: Jantzen One Piece Swimsuit

    Jantzen

    One Piece Swimsuit
    Size 3T
    $9.99 $5.49 45% off with code GOBIG
    28% off estimated retail
    InGear Rash Guard (view 2)InGear Rash Guard (view 1)Price Drop
    View Product: InGear Rash Guard

    InGear

    Rash Guard
    Size 3T
    $8.99 $4.94 45% off with code GOBIG
    65% off estimated retail
    Healthtex Rash Guard (view 2)Healthtex Rash Guard (view 1)
    View Product: Healthtex Rash Guard

    Healthtex

    Rash Guard
    Size 3T
    $8.99 $4.94 45% off with code GOBIG
    30% off estimated retail
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