Trending Categories
Trending Brands
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.
89 items
Sort by:
![Assorted Brands One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/609712606/complimentary.jpg)
![Assorted Brands One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/609712713/complimentary.jpg)
Assorted Brands
One Piece Swimsuit
Size 2T
$16.99 $9.34 45% off with code GOBIG
40% off estimated retail![Assorted Brands One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/609717009/complimentary.jpg)
![Assorted Brands One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/609717056/complimentary.jpg)
Assorted Brands
One Piece Swimsuit
Size 2T
$16.99 $9.34 45% off with code GOBIG
40% off estimated retail![Just One You Made by Carter's Rash Guard (view 2)](https://cf-assets-thredup.thredup.com/assets/607123267/complimentary.jpg)
![Just One You Made by Carter's Rash Guard (view 1)](https://cf-assets-thredup.thredup.com/assets/607123230/complimentary.jpg)
Just One You Made by Carter's
Rash Guard
Size 2T
$7.99 $4.39 45% off with code GOBIG
27% off estimated retail![Janie and Jack One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/606229737/complimentary.jpg)
![Janie and Jack One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/606229604/complimentary.jpg)
Janie and Jack
One Piece Swimsuit
Size 2T
$19.99 $10.99 45% off with code GOBIG
52% off estimated retail![DVF for Baby Gap One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/565535176/complimentary.jpg)
![DVF for Baby Gap One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/565535155/complimentary.jpg)
DVF for Baby Gap
One Piece Swimsuit
Size 2T
$13.99 $7.69 45% off with code GOBIG
57% off estimated retail![Assorted Brands One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/554811706/complimentary.jpg)
![Assorted Brands One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/554811672/complimentary.jpg)
Assorted Brands
One Piece Swimsuit
Size 2T
$12.99 $7.14 45% off with code GOBIG
40% off estimated retail