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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.
1,657 items
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![SunAlert One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/546248627/complimentary.jpg)
![SunAlert One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/546248583/complimentary.jpg)
SunAlert
One Piece Swimsuit
Size Medium infants
$6.99 $3.84 45% off with code GOBIG
36% off estimated retail![Abercrombie & Fitch Two Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/547666017/complimentary.jpg)
![Abercrombie & Fitch Two Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/547665964/complimentary.jpg)
Abercrombie & Fitch
Two Piece Swimsuit
Size 9
$13.99 $7.69 45% off with code GOBIG
71% off estimated retail![Shade Critters One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/545062863/complimentary.jpg)
![Shade Critters One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/545062666/complimentary.jpg)
Shade Critters
One Piece Swimsuit
Size 6-12 mo
$13.99 $7.69 45% off with code GOBIG
68% off estimated retail![Genuine Girl Board Shorts (view 2)](https://cf-assets-thredup.thredup.com/assets/515824127/complimentary.jpg)
![Genuine Girl Board Shorts (view 1)](https://cf-assets-thredup.thredup.com/assets/515824149/complimentary.jpg)
Genuine Girl
Board Shorts
Size Medium infants
$5.99 $3.29 45% off with code GOBIG
14% off estimated retail![Jessica Simpson One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/546318096/complimentary.jpg)
![Jessica Simpson One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/546318069/complimentary.jpg)
Jessica Simpson
One Piece Swimsuit
Size 12 mo
$8.99 $4.94 45% off with code GOBIG
43% off estimated retail![Assorted Brands Wetsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/544099920/complimentary.jpg)
![Assorted Brands Wetsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/544099962/complimentary.jpg)
Assorted Brands
Wetsuit
Size X-Large youth
$18.99 $10.44 45% off with code GOBIG
70% off estimated retail![Justice Swimsuit Cover Up (view 2)](https://cf-assets-thredup.thredup.com/assets/539518780/complimentary.jpg)
![Justice Swimsuit Cover Up (view 1)](https://cf-assets-thredup.thredup.com/assets/539518710/complimentary.jpg)
Justice
Swimsuit Cover Up
Size X-Large youth
$11.99 $6.59 45% off with code GOBIG
63% off estimated retail![Shade Critters One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/540828530/complimentary.jpg)
![Shade Critters One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/540828458/complimentary.jpg)
Shade Critters
One Piece Swimsuit
Size 18-24 mo
$13.99 $7.69 45% off with code GOBIG
68% off estimated retail![Creative Apparel One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/532349902/complimentary.jpg)
![Creative Apparel One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/532349830/complimentary.jpg)
Creative Apparel
One Piece Swimsuit
Size X-Large kids
$9.99 $5.49 45% off with code GOBIG
60% off estimated retail![The Children's Place One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/538637781/complimentary.jpg)
![The Children's Place One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/538637756/complimentary.jpg)
The Children's Place
One Piece Swimsuit
Size Medium infants
$8.99 $4.94 45% off with code GOBIG
50% off estimated retail![Dolce Vita Two Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/541318801/complimentary.jpg)
![Dolce Vita Two Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/541318666/complimentary.jpg)
Dolce Vita
Two Piece Swimsuit
Size Medium kids
$21.99 $12.09 45% off with code GOBIG
66% off estimated retail![Cupshe Two Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/528975405/complimentary.jpg)
![Cupshe Two Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/528975370/complimentary.jpg)
Cupshe
Two Piece Swimsuit
Size Medium kids
$10.99 $6.04 45% off with code GOBIG
42% off estimated retail![Limited Too One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/540377918/complimentary.jpg)
![Limited Too One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/540377718/complimentary.jpg)
Limited Too
One Piece Swimsuit
Size X-Small kids
$10.99 $6.04 45% off with code GOBIG
59% off estimated retail![Gap Kids Two Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/536417320/complimentary.jpg)
![Gap Kids Two Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/536417294/complimentary.jpg)
Gap Kids
Two Piece Swimsuit
Size Large kids
$11.99 $6.59 45% off with code GOBIG
62% off estimated retail![Tommy Bahama Two Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/533400033/complimentary.jpg)
![Tommy Bahama Two Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/533399977/complimentary.jpg)
Tommy Bahama
Two Piece Swimsuit
Size 12 mo
$10.99 $6.04 45% off with code GOBIG
59% off estimated retail![Hanes Two Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/529764967/complimentary.jpg)
![Hanes Two Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/529764915/complimentary.jpg)
Hanes
Two Piece Swimsuit
Size X-Large youth
$9.99 $5.49 45% off with code GOBIG
37% off estimated retail![The Children's Place One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/529036229/complimentary.jpg)
![The Children's Place One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/529036162/complimentary.jpg)
The Children's Place
One Piece Swimsuit
Size 24 mo
$9.99 $5.49 45% off with code GOBIG
44% off estimated retail![Stella Cove One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/525906694/complimentary.jpg)
![Stella Cove One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/525906669/complimentary.jpg)
Stella Cove
One Piece Swimsuit
Size 12-18 mo
$9.99 $5.49 45% off with code GOBIG
63% off estimated retail![Heart & Hips One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/525310044/complimentary.jpg)
![Heart & Hips One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/525309940/complimentary.jpg)
Heart & Hips
One Piece Swimsuit
Size Small youth
$9.99 $5.49 45% off with code GOBIG
37% off estimated retail![Hanna Andersson Two Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/523086069/complimentary.jpg)
![Hanna Andersson Two Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/523085934/complimentary.jpg)
Hanna Andersson
Two Piece Swimsuit
Size 110 cm
$11.99 $6.59 45% off with code GOBIG
70% off estimated retail![Athleta Two Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/522116369/complimentary.jpg)
![Athleta Two Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/522116313/complimentary.jpg)
Athleta
Two Piece Swimsuit
Size Medium kids
$10.99 $6.04 45% off with code GOBIG
73% off estimated retail![Gap Kids Two Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/522547208/complimentary.jpg)
![Gap Kids Two Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/522547179/complimentary.jpg)
Gap Kids
Two Piece Swimsuit
Size Medium infants
$8.99 $4.94 45% off with code GOBIG
66% off estimated retail![Egg by Susan Lazar Two Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/521001111/complimentary.jpg)
![Egg by Susan Lazar Two Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/521001077/complimentary.jpg)
Egg by Susan Lazar
Two Piece Swimsuit
Size 12 mo
$9.99 $5.49 45% off with code GOBIG
54% off estimated retail![Polarn O. Pyret Two Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/520491143/complimentary.jpg)
![Polarn O. Pyret Two Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/520491083/complimentary.jpg)
Polarn O. Pyret
Two Piece Swimsuit
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
69% off estimated retail![Island Soul Two Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/517616156/complimentary.jpg)
![Island Soul Two Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/517616164/complimentary.jpg)
Island Soul
Two Piece Swimsuit
Size Small youth
$10.99 $6.04 45% off with code GOBIG
73% off estimated retail![Art Class One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/517843826/complimentary.jpg)
![Art Class One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/517843780/complimentary.jpg)
Art Class
One Piece Swimsuit
Size Small infants
$7.99 $4.39 45% off with code GOBIG
42% off estimated retail![Wonder Nation One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/516312633/complimentary.jpg)
![Wonder Nation One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/516312576/complimentary.jpg)
Wonder Nation
One Piece Swimsuit
Size 12 mo
$7.99 $4.39 45% off with code GOBIG
27% off estimated retail![Snapper Rock One Piece Swimsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/517360852/complimentary.jpg)
![Snapper Rock One Piece Swimsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/517360830/complimentary.jpg)
Snapper Rock
One Piece Swimsuit
Size 12-18 mo
$8.99 $4.94 45% off with code GOBIG
43% off estimated retail