Trending Categories
Trending Brands
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!
606 items
Sort by:
![Where the Wild Things Are Long Sleeve Outfit (view 2)](https://cf-assets-thredup.thredup.com/assets/572734590/complimentary.jpg)
![Where the Wild Things Are Long Sleeve Outfit (view 1)](https://cf-assets-thredup.thredup.com/assets/572734583/complimentary.jpg)
Where the Wild Things Are
Long Sleeve Outfit
Size 3-6 mo
$5.99 $3.29 45% off with code GOBIG
62% off estimated retail![Child of Mine by Carter's Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/575128927/complimentary.jpg)
![Child of Mine by Carter's Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/575128873/complimentary.jpg)
Child of Mine by Carter's
Short Sleeve Onesie
Size 3-6 mo
$5.99 $3.29 45% off with code GOBIG
14% off estimated retail![JoJo Maman Bebe Long Sleeve Outfit (view 2)](https://cf-assets-thredup.thredup.com/assets/571331892/complimentary.jpg)
![JoJo Maman Bebe Long Sleeve Outfit (view 1)](https://cf-assets-thredup.thredup.com/assets/571331794/complimentary.jpg)
JoJo Maman Bebe
Long Sleeve Outfit
Size 3-6 mo
$12.99 $7.14 45% off with code GOBIG
60% off estimated retail![Assorted Brands Long Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/568258354/complimentary.jpg)
![Assorted Brands Long Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/568258306/complimentary.jpg)
Assorted Brands
Long Sleeve Onesie
Size 3-6 mo
$13.99 $7.69 45% off with code GOBIG
36% off estimated retail![Primary Clothing Long Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/557509344/complimentary.jpg)
![Primary Clothing Long Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/557509256/complimentary.jpg)
Primary Clothing
Long Sleeve Onesie
Size 3-6 mo
$6.99 $3.84 45% off with code GOBIG
74% off estimated retail![Cloud Island Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/567078688/complimentary.jpg)
![Cloud Island Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/567078665/complimentary.jpg)
Cloud Island
Short Sleeve Onesie
Size 3-6 mo
$5.99 $3.29 45% off with code GOBIG
14% off estimated retail![Cambridge Classics Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/565895012/complimentary.jpg)
![Cambridge Classics Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/565894984/complimentary.jpg)
Cambridge Classics
Short Sleeve Onesie
Size 3-6 mo
$3.99 $2.19 45% off with code GOBIG
43% off estimated retail![Child of Mine by Carter's Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/567645299/complimentary.jpg)
![Child of Mine by Carter's Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/567645206/complimentary.jpg)
Child of Mine by Carter's
Short Sleeve Onesie
Size 3-6 mo
$4.99 $2.74 45% off with code GOBIG
28% off estimated retail![Child of Mine by Carter's Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/566840718/complimentary.jpg)
![Child of Mine by Carter's Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/566840704/complimentary.jpg)
Child of Mine by Carter's
Short Sleeve Onesie
Size 3-6 mo
$4.99 $2.74 45% off with code GOBIG
28% off estimated retail![Team Athletics Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/567239930/complimentary.jpg)
![Team Athletics Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/567239879/complimentary.jpg)
Team Athletics
Short Sleeve Onesie
Size 3-6 mo
$5.99 $3.29 45% off with code GOBIG
14% off estimated retail![Disney Baby Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/567502121/complimentary.jpg)
![Disney Baby Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/567502066/complimentary.jpg)
Disney Baby
Short Sleeve Onesie
Size 3-6 mo
$4.99 $2.74 45% off with code GOBIG
28% off estimated retail![Child of Mine by Carter's Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/565383945/complimentary.jpg)
![Child of Mine by Carter's Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/565383924/complimentary.jpg)
Child of Mine by Carter's
Short Sleeve Onesie
Size 3-6 mo
$5.99 $3.29 45% off with code GOBIG
14% off estimated retail![Duck Duck Goose Long Sleeve Outfit (view 2)](https://cf-assets-thredup.thredup.com/assets/563043110/complimentary.jpg)
![Duck Duck Goose Long Sleeve Outfit (view 1)](https://cf-assets-thredup.thredup.com/assets/563043031/complimentary.jpg)
Duck Duck Goose
Long Sleeve Outfit
Size 3-6 mo
$5.99 $3.29 45% off with code GOBIG
45% off estimated retail![Assorted Brands Long Sleeve Outfit (view 2)](https://cf-assets-thredup.thredup.com/assets/562345422/complimentary.jpg)
![Assorted Brands Long Sleeve Outfit (view 1)](https://cf-assets-thredup.thredup.com/assets/562345397/complimentary.jpg)
Assorted Brands
Long Sleeve Outfit
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
59% off estimated retail![Kyle & Deena Short Sleeve Outfit (view 2)](https://cf-assets-thredup.thredup.com/assets/562688908/complimentary.jpg)
![Kyle & Deena Short Sleeve Outfit (view 1)](https://cf-assets-thredup.thredup.com/assets/562688887/complimentary.jpg)
Kyle & Deena
Short Sleeve Outfit
Size 3-6 mo
$5.99 $3.29 45% off with code GOBIG
14% off estimated retail![First Impressions Short Sleeve Outfit (view 2)](https://cf-assets-thredup.thredup.com/assets/559696190/complimentary.jpg)
![First Impressions Short Sleeve Outfit (view 1)](https://cf-assets-thredup.thredup.com/assets/559696095/complimentary.jpg)
First Impressions
Short Sleeve Outfit
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
50% off estimated retail![Nicole Miller New York Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/556330336/complimentary.jpg)
![Nicole Miller New York Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/556330280/complimentary.jpg)
Nicole Miller New York
Short Sleeve Onesie
Size 3-6 mo
$6.99 $3.84 45% off with code GOBIG
36% off estimated retail![Little Beginnings Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/558139730/complimentary.jpg)
![Little Beginnings Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/558139673/complimentary.jpg)
Little Beginnings
Short Sleeve Onesie
Size 3-6 mo
$5.99 $3.29 45% off with code GOBIG
14% off estimated retail![Swinging on a Star Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/557028887/complimentary.jpg)
![Swinging on a Star Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/557028858/complimentary.jpg)
Swinging on a Star
Short Sleeve Onesie
Size 3-6 mo
$6.99 $3.84 45% off with code GOBIG
36% off estimated retail![Swinging on a Star Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/560978913/complimentary.jpg)
![Swinging on a Star Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/560978889/complimentary.jpg)
Swinging on a Star
Short Sleeve Onesie
Size 3-6 mo
$7.99 $4.39 45% off with code GOBIG
27% off estimated retail![Assorted Brands Long Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/556214068/complimentary.jpg)
![Assorted Brands Long Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/556213949/complimentary.jpg)
Assorted Brands
Long Sleeve Onesie
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
54% off estimated retail![B.U.M. Equipment Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/555795458/complimentary.jpg)
![B.U.M. Equipment Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/555795436/complimentary.jpg)
B.U.M. Equipment
Short Sleeve Onesie
Size 3-6 mo
$7.99 $4.39 45% off with code GOBIG
27% off estimated retail![Nicole Miller Long Sleeve Outfit (view 2)](https://cf-assets-thredup.thredup.com/assets/556170477/complimentary.jpg)
![Nicole Miller Long Sleeve Outfit (view 1)](https://cf-assets-thredup.thredup.com/assets/556170419/complimentary.jpg)
Nicole Miller
Long Sleeve Outfit
Size 3-6 mo
$11.99 $6.59 45% off with code GOBIG
63% off estimated retail![Chasing Fireflies Long Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/554043013/complimentary.jpg)
![Chasing Fireflies Long Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/554042979/complimentary.jpg)
Chasing Fireflies
Long Sleeve Onesie
Size 3-6 mo
$5.99 $3.29 45% off with code GOBIG
45% off estimated retail![Laughing Giraffe Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/553658872/complimentary.jpg)
![Laughing Giraffe Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/553658898/complimentary.jpg)
Laughing Giraffe
Short Sleeve Onesie
Size 3-6 mo
$6.99 $3.84 45% off with code GOBIG
53% off estimated retail![Assorted Brands Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/554316394/complimentary.jpg)
![Assorted Brands Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/554316334/complimentary.jpg)
Assorted Brands
Short Sleeve Onesie
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
40% off estimated retail![Assorted Brands Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/552386727/complimentary.jpg)
![Assorted Brands Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/552386686/complimentary.jpg)
Assorted Brands
Short Sleeve Onesie
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
40% off estimated retail![Assorted Brands Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/551144861/complimentary.jpg)
![Assorted Brands Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/551144827/complimentary.jpg)
Assorted Brands
Short Sleeve Onesie
Size 3-6 mo
$6.99 $3.84 45% off with code GOBIG
53% off estimated retail![Little Beginnings Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/550933834/complimentary.jpg)
![Little Beginnings Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/550933796/complimentary.jpg)
Little Beginnings
Short Sleeve Onesie
Size 3-6 mo
$5.99 $3.29 45% off with code GOBIG
14% off estimated retail![Assorted Brands Long Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/505655612/complimentary.jpg)
![Assorted Brands Long Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/505655611/complimentary.jpg)
Assorted Brands
Long Sleeve Onesie
Size 3-6 mo
$7.99 $4.39 45% off with code GOBIG
63% off estimated retail![Assorted Brands Short Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/548202447/complimentary.jpg)
![Assorted Brands Short Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/548202403/complimentary.jpg)
Assorted Brands
Short Sleeve Onesie
Size 3-6 mo
$7.99 $4.39 45% off with code GOBIG
46% off estimated retail![Emily and Oliver Short Sleeve Outfit (view 2)](https://cf-assets-thredup.thredup.com/assets/547386755/complimentary.jpg)
![Emily and Oliver Short Sleeve Outfit (view 1)](https://cf-assets-thredup.thredup.com/assets/547386701/complimentary.jpg)
Emily and Oliver
Short Sleeve Outfit
Size 3-6 mo
$6.99 $3.84 45% off with code GOBIG
22% off estimated retail![Assorted Brands Short Sleeve Outfit (view 2)](https://cf-assets-thredup.thredup.com/assets/548813616/complimentary.jpg)
![Assorted Brands Short Sleeve Outfit (view 1)](https://cf-assets-thredup.thredup.com/assets/548813550/complimentary.jpg)
Assorted Brands
Short Sleeve Outfit
Size 3-6 mo
$7.99 $4.39 45% off with code GOBIG
46% off estimated retail![Cloud Island Long Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/546627955/complimentary.jpg)
![Cloud Island Long Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/546627921/complimentary.jpg)
Cloud Island
Long Sleeve Onesie
Size 3-6 mo
$5.99 $3.29 45% off with code GOBIG
45% off estimated retail![Child of Mine by Carter's Long Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/546497535/complimentary.jpg)
![Child of Mine by Carter's Long Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/546497469/complimentary.jpg)
Child of Mine by Carter's
Long Sleeve Onesie
Size 3-6 mo
$7.99 $4.39 45% off with code GOBIG
27% off estimated retail![Jessica Simpson Long Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/546332946/complimentary.jpg)
![Jessica Simpson Long Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/546332926/complimentary.jpg)
Jessica Simpson
Long Sleeve Onesie
Size 3-6 mo
$6.99 $3.84 45% off with code GOBIG
56% off estimated retail![Daisy Fuentes Long Sleeve Onesie (view 2)](https://cf-assets-thredup.thredup.com/assets/562257444/complimentary.jpg)
![Daisy Fuentes Long Sleeve Onesie (view 1)](https://cf-assets-thredup.thredup.com/assets/562257398/complimentary.jpg)
Daisy Fuentes
Long Sleeve Onesie
Size 3-6 mo
$8.99 $4.94 45% off with code GOBIG
59% off estimated retail