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From toddlers to preteens, girls appreciate having the perfect outfit. Whether the girls in your life are princesses or sports stars, thredUP has a nice selection of clothes to meet their preferences. Clothes don't grow™, your kids do—shop today to find amazing items at up to 90% off estimated retail!

9-12 moRemove filterSpandexRemove filter
38 items
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    Mud Pie Long Sleeve Outfit (view 2)Mud Pie Long Sleeve Outfit (view 1)
    View Product: Mud Pie Long Sleeve Outfit

    Mud Pie

    Long Sleeve Outfit
    Size 9-12 mo
    $9.99
    54% off estimated retail
    Tea Rash Guard (view 2)Tea Rash Guard (view 1)
    View Product: Tea Rash Guard

    Tea

    Rash Guard
    Size 9-12 mo
    $14.99 $10.49 30% off with code SHINE
    44% off estimated retail
    Monica + Andy Long Sleeve Onesie (view 2)Monica + Andy Long Sleeve Onesie (view 1)
    View Product: Monica + Andy Long Sleeve Onesie

    Monica + Andy

    Long Sleeve Onesie
    Size 9-12 mo
    $9.99 $7.99 20% off with code SHINE
    54% off estimated retail
    Mud Pie One Piece Swimsuit (view 2)Mud Pie One Piece Swimsuit (view 1)
    View Product: Mud Pie One Piece Swimsuit

    Mud Pie

    One Piece Swimsuit
    Size 9-12 mo
    $9.99 $7.99 20% off with code SHINE
    54% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Under Armour Active Pants (view 2)Under Armour Active Pants (view 1)
    View Product: Under Armour Active Pants

    Under Armour

    Active Pants
    Size 9-12 mo
    $9.99 $7.49 25% off with code SHINE
    44% off estimated retail
    Unbranded Long Sleeve Onesie (view 2)Unbranded Long Sleeve Onesie (view 1)
    View Product: Unbranded Long Sleeve Onesie

    Unbranded

    Long Sleeve Onesie
    Size 9-12 mo
    $11.99 $9.59 20% off with code SHINE
    45% off estimated retail
    Unbranded Short Sleeve Onesie (view 2)Unbranded Short Sleeve Onesie (view 1)
    View Product: Unbranded Short Sleeve Onesie

    Unbranded

    Short Sleeve Onesie
    Size 9-12 mo
    $8.99 $7.19 20% off with code SHINE
    40% off estimated retail
    BAILEY'S BLOSSOMS Dress (view 2)BAILEY'S BLOSSOMS Dress (view 1)
    View Product: BAILEY'S BLOSSOMS Dress

    BAILEY'S BLOSSOMS

    Dress
    Size 9-12 mo
    $10.99 $8.79 20% off with code SHINE
    62% off estimated retail
    Shein Long Sleeve Onesie (view 2)Shein Long Sleeve Onesie (view 1)
    View Product: Shein Long Sleeve Onesie

    Shein

    Long Sleeve Onesie
    Size 9-12 mo
    $10.99 $8.79 20% off with code SHINE
    $11
    Shein Long Sleeve Onesie (view 2)Shein Long Sleeve Onesie (view 1)
    View Product: Shein Long Sleeve Onesie

    Shein

    Long Sleeve Onesie
    Size 9-12 mo
    $7.99 $6.39 20% off with code SHINE
    27% off estimated retail
    Aden + Anais Short Sleeve Onesie (view 2)Aden + Anais Short Sleeve Onesie (view 1)
    View Product: Aden + Anais Short Sleeve Onesie

    Aden + Anais

    Short Sleeve Onesie
    Size 9-12 mo
    $9.99 $7.99 20% off with code SHINE
    $11
    Turtles & Tees Short Sleeve Onesie (view 2)Turtles & Tees Short Sleeve Onesie (view 1)
    View Product: Turtles & Tees Short Sleeve Onesie

    Turtles & Tees

    Short Sleeve Onesie
    Size 9-12 mo
    $5.99 $4.79 20% off with code SHINE
    60% off estimated retail
    Unbranded Long Sleeve Outfit (view 2)Unbranded Long Sleeve Outfit (view 1)
    View Product: Unbranded Long Sleeve Outfit

    Unbranded

    Long Sleeve Outfit
    Size 9-12 mo
    $6.99 $5.59 20% off with code SHINE
    68% off estimated retail
    Assorted Brands Short Sleeve Onesie (view 2)Assorted Brands Short Sleeve Onesie (view 1)
    View Product: Assorted Brands Short Sleeve Onesie

    Assorted Brands

    Short Sleeve Onesie
    Size 9-12 mo
    $8.99 $7.19 20% off with code SHINE
    40% off estimated retail
    Monica + Andy Long Sleeve Onesie (view 2)Monica + Andy Long Sleeve Onesie (view 1)
    View Product: Monica + Andy Long Sleeve Onesie

    Monica + Andy

    Long Sleeve Onesie
    Size 9-12 mo
    $12.99 $9.09 30% off with code SHINE
    40% off estimated retail
    Monica + Andy Long Sleeve Onesie (view 2)Monica + Andy Long Sleeve Onesie (view 1)
    View Product: Monica + Andy Long Sleeve Onesie

    Monica + Andy

    Long Sleeve Onesie
    Size 9-12 mo
    $13.99 $9.79 30% off with code SHINE
    36% off estimated retail
    Pout Pullover Sweater (view 2)Pout Pullover Sweater (view 1)
    View Product: Pout Pullover Sweater

    Pout

    Pullover Sweater
    Size 9-12 mo
    $9.99 $6.49 35% off with code SHINE
    63% off estimated retail
    Turtles & Tees Long Sleeve Onesie (view 2)Turtles & Tees Long Sleeve Onesie (view 1)
    View Product: Turtles & Tees Long Sleeve Onesie

    Turtles & Tees

    Long Sleeve Onesie
    Size 9-12 mo
    $6.99 $5.59 20% off with code SHINE
    68% off estimated retail
    PatPat Long Sleeve Outfit (view 2)PatPat Long Sleeve Outfit (view 1)New With Tags
    View Product: PatPat Long Sleeve Outfit

    PatPat

    Long Sleeve Outfit
    Size 9-12 mo
    $9.99 $7.99 20% off with code SHINE
    $11
    Shein Long Sleeve Outfit (view 2)Shein Long Sleeve Outfit (view 1)
    View Product: Shein Long Sleeve Outfit

    Shein

    Long Sleeve Outfit
    Size 9-12 mo
    $7.99 $6.39 20% off with code SHINE
    27% off estimated retail
    Mud Pie One Piece Swimsuit (view 2)Mud Pie One Piece Swimsuit (view 1)Price Drop
    View Product: Mud Pie One Piece Swimsuit

    Mud Pie

    One Piece Swimsuit
    Size 9-12 mo
    $11.99 $9.59 20% off with code SHINE
    45% off estimated retail
    Monica + Andy Long Sleeve Onesie (view 2)Monica + Andy Long Sleeve Onesie (view 1)
    View Product: Monica + Andy Long Sleeve Onesie

    Monica + Andy

    Long Sleeve Onesie
    Size 9-12 mo
    $9.99 $7.49 25% off with code SHINE
    54% off estimated retail
    Unbranded Dress (view 2)Unbranded Dress (view 1)
    View Product: Unbranded Dress

    Unbranded

    Dress
    Size 9-12 mo
    $9.99 $7.99 20% off with code SHINE
    65% off estimated retail
    Assorted Brands Short Sleeve Onesie (view 2)Assorted Brands Short Sleeve Onesie (view 1)
    View Product: Assorted Brands Short Sleeve Onesie

    Assorted Brands

    Short Sleeve Onesie
    Size 9-12 mo
    $5.99 $4.79 20% off with code SHINE
    60% off estimated retail
    Unbranded Long Sleeve Outfit (view 2)Unbranded Long Sleeve Outfit (view 1)
    View Product: Unbranded Long Sleeve Outfit

    Unbranded

    Long Sleeve Outfit
    Size 9-12 mo
    $7.99 $6.39 20% off with code SHINE
    63% off estimated retail
    MNG Kids Shorts (view 2)MNG Kids Shorts (view 1)
    View Product: MNG Kids Shorts

    MNG Kids

    Shorts
    Size 9-12 mo
    $8.99 $7.19 20% off with code SHINE
    18% off estimated retail
    Assorted Brands Short Sleeve Onesie (view 2)Assorted Brands Short Sleeve Onesie (view 1)Price Drop
    View Product: Assorted Brands Short Sleeve Onesie

    Assorted Brands

    Short Sleeve Onesie
    Size 9-12 mo
    $9.99 $7.99 20% off with code SHINE
    33% off estimated retail
    PatPat Long Sleeve Onesie (view 2)PatPat Long Sleeve Onesie (view 1)New With Tags
    View Product: PatPat Long Sleeve Onesie

    PatPat

    Long Sleeve Onesie
    Size 9-12 mo
    $8.99 $7.19 20% off with code SHINE
    18% off estimated retail
    Shein Short Sleeve Onesie (view 2)Shein Short Sleeve Onesie (view 1)
    View Product: Shein Short Sleeve Onesie

    Shein

    Short Sleeve Onesie
    Size 9-12 mo
    $6.99 $5.59 20% off with code SHINE
    $7
    Unbranded Short Sleeve Onesie (view 2)Unbranded Short Sleeve Onesie (view 1)
    View Product: Unbranded Short Sleeve Onesie

    Unbranded

    Short Sleeve Onesie
    Size 9-12 mo
    $6.99 $5.59 20% off with code SHINE
    53% off estimated retail
    Hatley Long Sleeve Outfit (view 2)Hatley Long Sleeve Outfit (view 1)Price Drop
    View Product: Hatley Long Sleeve Outfit

    Hatley

    Long Sleeve Outfit
    Size 9-12 mo
    $11.99 $7.19 40% off with code SHINE
    55% off estimated retail
    Rabbit Moon Casual Pants (view 2)Rabbit Moon Casual Pants (view 1)Price Drop
    View Product: Rabbit Moon Casual Pants

    Rabbit Moon

    Casual Pants
    Size 9-12 mo
    $6.99 $5.59 20% off with code SHINE
    75% off estimated retail
    Aden + Anais Leotard (view 2)Aden + Anais Leotard (view 1)Price Drop
    View Product: Aden + Anais Leotard

    Aden + Anais

    Leotard
    Size 9-12 mo
    $7.99 $6.39 20% off with code SHINE
    27% off estimated retail
    Disney Short Sleeve T-Shirt (view 2)Disney Short Sleeve T-Shirt (view 1)Price Drop
    View Product: Disney Short Sleeve T-Shirt

    Disney

    Short Sleeve T-Shirt
    Size 9-12 mo
    $5.99 $4.79 20% off with code SHINE
    53% off estimated retail
    Baby Gap Dress (view 2)Baby Gap Dress (view 1)Price Drop
    View Product: Baby Gap Dress

    Baby Gap

    Dress
    Size 9-12 mo
    $8.99 $7.19 20% off with code SHINE
    75% off estimated retail
    Disney One Piece Swimsuit (view 2)Disney One Piece Swimsuit (view 1)Price Drop
    View Product: Disney One Piece Swimsuit

    Disney

    One Piece Swimsuit
    Size 9-12 mo
    $9.99 $7.99 20% off with code SHINE
    52% off estimated retail
    Andy & Evan Shorts (view 2)Andy & Evan Shorts (view 1)Price Drop
    View Product: Andy & Evan Shorts

    Andy & Evan

    Shorts
    Size 9-12 mo
    $8.99 $7.19 20% off with code SHINE
    75% off estimated retail
    Paige Lauren Baby Thermal Top (view 2)Paige Lauren Baby Thermal Top (view 1)
    View Product: Paige Lauren Baby Thermal Top

    Paige Lauren Baby

    Thermal Top
    Size 9-12 mo
    $6.99 $5.59 20% off with code SHINE
    50% off estimated retail
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