Boys' Swimwear

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Whether it's a day at the pool or the beach, your little man needs a comfortable and stylish look. At thredUP, you'll find boys' swimwear in a variety of styles, colors, and designs that he will love, and at up to 90% off estimated retail, the prices will make you happy as well.

4,568 items
Hurley Size 10

View Product: Hurley Size 10

Hurley

Size 10
$9.99 $33
Just One You Made by Carter's Size 9 mo
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View Product: Just One You Made by Carter's Size 9 mo
RS Surf Size 7

View Product: RS Surf Size 7

RS Surf

Size 7
$6.99 $14
Old Navy Size 2T
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View Product: Old Navy Size 2T

Old Navy

Size 2T
$6.99 $16
Forever Classic, Get perfectly polished in trousers, blazers, and more.
Ocean Current Size Medium tots

View Product: Ocean Current Size Medium tots

Ocean Current

Size Medium tots
$6.99 $9
UV Skinz Size 12-18 mo
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View Product: UV Skinz Size 12-18 mo

UV Skinz

Size 12-18 mo
$6.99 $18
DSG Size 8
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View Product: DSG Size 8

DSG

Size 8
$6.99 $20
Old Navy Size X-Large youth
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View Product: Old Navy Size X-Large youth

Old Navy

Size X-Large youth
$10.99 $27

$5.49 50% off with

Nike Size Large kids
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View Product: Nike Size Large kids

Nike

Size Large kids
$15.99 $39

$6.40 60% off with

CHEEKA ABOO Size X-Large kids
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View Product: CHEEKA ABOO Size X-Large kids

CHEEKA ABOO

Size X-Large kids
$9.99 $49

$4.00 60% off with

Assorted Brands Size Small infants
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View Product: Assorted Brands Size Small infants

Assorted Brands

Size Small infants
$13.99 $44

$5.60 60% off with

Baby Gap Size 3

View Product: Baby Gap Size 3

Baby Gap

Size 3
$11.99 $21

$7.19 40% off with

Carter's Size 3T

View Product: Carter's Size 3T

Carter's

Size 3T
$10.99 $26

$6.59 40% off with

Hanna Andersson Size 120 cm
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View Product: Hanna Andersson Size 120 cm

Hanna Andersson

Size 120 cm
$11.99 $30

$5.99 50% off with

Old Navy Size 6

View Product: Old Navy Size 6

Old Navy

Size 6
$12.99 $27

$7.79 40% off with

Assorted Brands Size 150 cm
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View Product: Assorted Brands Size 150 cm

Assorted Brands

Size 150 cm
$12.99 $33

$6.49 50% off with

Gymboree Size 3T
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View Product: Gymboree Size 3T

Gymboree

Size 3T
$11.99 $27

$5.99 50% off with

I Play Size Large tots

View Product: I Play Size Large tots

I Play

Size Large tots
$10.99 $14
Baby Gap Size 3

View Product: Baby Gap Size 3

Baby Gap

Size 3
$11.99 $21
Star Wars Size X-Small youth

View Product: Star Wars Size X-Small youth

Star Wars

Size X-Small youth
$8.99 $16
Carter's Size 4T

View Product: Carter's Size 4T

Carter's

Size 4T
$9.99 $26
Mini Boden Size 7

View Product: Mini Boden Size 7

Mini Boden

Size 7
$16.99 $41
Assorted Brands Size Medium youth

View Product: Assorted Brands Size Medium youth

Assorted Brands

Size Medium youth
$11.99 $22
REI Size Large youth

View Product: REI Size Large youth

REI

Size Large youth
$11.99 $27
Cat & Jack Size 4

View Product: Cat & Jack Size 4

Cat & Jack

Size 4
$9.99 $13
Peek... Size 8

View Product: Peek... Size 8

Peek...

Size 8
$11.99 $33
OshKosh B'gosh Size 2T

View Product: OshKosh B'gosh Size 2T

OshKosh B'gosh

Size 2T
$10.99 $19
Kiko & Max Size 2T

View Product: Kiko & Max Size 2T

Kiko & Max

Size 2T
$10.99 $18
Old Navy Size 5T

View Product: Old Navy Size 5T

Old Navy

Size 5T
$11.99 $16
Assorted Brands Size 4T

View Product: Assorted Brands Size 4T

Assorted Brands

Size 4T
$7.99 $18
Lands' End Size 5

View Product: Lands' End Size 5

Lands' End

Size 5
$7.99 $18
Carter's Size 12 mo

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$14.99 $30
Rusty Size X-Large youth

View Product: Rusty Size X-Large youth

Rusty

Size X-Large youth
$8.99 $11
Old Navy Size 4

View Product: Old Navy Size 4

Old Navy

Size 4
$7.99 $16
Hanna Andersson Size 110 cm

View Product: Hanna Andersson Size 110 cm

Hanna Andersson

Size 110 cm
$20.99 $41
Rip Curl Size Medium youth

View Product: Rip Curl Size Medium youth

Rip Curl

Size Medium youth
$10.99 $33
Garnet Hill Size 8

View Product: Garnet Hill Size 8

Garnet Hill

Size 8
$10.99 $33
Assorted Brands Size 2
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View Product: Assorted Brands Size 2

Assorted Brands

Size 2
$6.99 $15
Gymboree Size 6-12 mo
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View Product: Gymboree Size 6-12 mo

Gymboree

Size 6-12 mo
$6.99 $25
Old Navy Size 12-18 mo

View Product: Old Navy Size 12-18 mo

Old Navy

Size 12-18 mo
$12.99 $18

$7.79 40% off with

Assorted Brands Size 4T

View Product: Assorted Brands Size 4T

Assorted Brands

Size 4T
$11.99 $27

$7.19 40% off with

Kanu Surf Size 3T
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View Product: Kanu Surf Size 3T

Kanu Surf

Size 3T
$9.99 $18

$4.99 50% off with

Trunk Ltd. Size 3T
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View Product: Trunk Ltd. Size 3T

Trunk Ltd.

Size 3T
$15.99 $45

$7.99 50% off with

Carter's Size 3T

View Product: Carter's Size 3T

Carter's

Size 3T
$17.99 $30

$10.79 40% off with

Hanna Andersson Size 80 cm
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View Product: Hanna Andersson Size 80 cm

Hanna Andersson

Size 80 cm
$12.99 $41

$5.20 60% off with

Assorted Brands Size 4T

View Product: Assorted Brands Size 4T

Assorted Brands

Size 4T
$12.99 $27

$7.79 40% off with

Carter's Size 12 mo

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$12.99 $30

$7.79 40% off with

Carter's Size 2T

View Product: Carter's Size 2T

Carter's

Size 2T
$10.99 $26

$6.59 40% off with

Baby Gap Size 4
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View Product: Baby Gap Size 4

Baby Gap

Size 4
$8.99 $21

$5.39 40% off with

Gymboree Size 7

View Product: Gymboree Size 7

Gymboree

Size 7
$10.99 $27

$6.59 40% off with

Baby Gap Size 12-18 mo

View Product: Baby Gap Size 12-18 mo

Baby Gap

Size 12-18 mo
$10.99 $21

$6.59 40% off with

Baby Gap Size 12-18 mo
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View Product: Baby Gap Size 12-18 mo

Baby Gap

Size 12-18 mo
$8.99 $21

$5.39 40% off with

L.L.Bean Size 4

View Product: L.L.Bean Size 4

L.L.Bean

Size 4
$13.99 $27

$8.39 40% off with

Mud Pie Size 9-12 mo
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View Product: Mud Pie Size 9-12 mo

Mud Pie

Size 9-12 mo
$15.99 $44

$6.40 60% off with

Old Navy Size Large youth
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View Product: Old Navy Size Large youth

Old Navy

Size Large youth
$10.99 $27

$5.49 50% off with

Gap Kids Size 7
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View Product: Gap Kids Size 7

Gap Kids

Size 7
$9.99 $32

$4.99 50% off with

Coolibar Size Medium kids

View Product: Coolibar Size Medium kids

Coolibar

Size Medium kids
$8.99 $33
Gap Kids Size Small kids

View Product: Gap Kids Size Small kids

Gap Kids

Size Small kids
$11.99 $32
Kanu Surf Size 10
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View Product: Kanu Surf Size 10

Kanu Surf

Size 10
$11.99 $25.99
O'Neill Size 14
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View Product: O'Neill Size 14

O'Neill

Size 14
$17.99 $35
Carter's Size 2T

View Product: Carter's Size 2T

Carter's

Size 2T
$14.99 $30
Baby Gap Size 2

View Product: Baby Gap Size 2

Baby Gap

Size 2
$8.99 $21
Nike Size Large youth

View Product: Nike Size Large youth

Nike

Size Large youth
$19.99 $39
Carter's Size 14

View Product: Carter's Size 14

Carter's

Size 14
$15.99 $30
Big Chill Size 14

View Product: Big Chill Size 14

Big Chill

Size 14
$11.99 $16
Assorted Brands Size Medium youth

View Product: Assorted Brands Size Medium youth

Assorted Brands

Size Medium youth
$8.99 $22
Nike Size Large youth

View Product: Nike Size Large youth

Nike

Size Large youth
$18.99 $39
Nike Size Large youth

View Product: Nike Size Large youth

Nike

Size Large youth
$18.99 $39
Tommy Bahama Size 10

View Product: Tommy Bahama Size 10

Tommy Bahama

Size 10
$12.99 $27
Old Navy Size 10

View Product: Old Navy Size 10

Old Navy

Size 10
$14.99 $27
Nike Size Large youth

View Product: Nike Size Large youth

Nike

Size Large youth
$19.99 $39
Floatimini Size 12 mo
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View Product: Floatimini Size 12 mo

Floatimini

Size 12 mo
$21.99 $55
Gap Kids Size Large kids

View Product: Gap Kids Size Large kids

Gap Kids

Size Large kids
$13.99 $32
Tom & Teddy Size 2

View Product: Tom & Teddy Size 2

Tom & Teddy

Size 2
$15.99 $36
Old Navy Size 8

View Product: Old Navy Size 8

Old Navy

Size 8
$11.99 $27
Old Navy Size 4T

View Product: Old Navy Size 4T

Old Navy

Size 4T
$9.99 $18
Gap Kids Size Small kids

View Product: Gap Kids Size Small kids

Gap Kids

Size Small kids
$9.99 $27
Cat & Jack Size 6

View Product: Cat & Jack Size 6

Cat & Jack

Size 6
$9.99 $13
Old Navy Size 10

View Product: Old Navy Size 10

Old Navy

Size 10
$13.99 $27
Kanu Surf Size 10

View Product: Kanu Surf Size 10

Kanu Surf

Size 10
$13.99 $22
Gymboree Size X-Large youth

View Product: Gymboree Size X-Large youth

Gymboree

Size X-Large youth
$11.99 $27
UV Skinz Size 5

View Product: UV Skinz Size 5

UV Skinz

Size 5
$14.99 $34
City Threads Size 3T

View Product: City Threads Size 3T

City Threads

Size 3T
$7.99 $14
Gap Kids Size Large kids

View Product: Gap Kids Size Large kids

Gap Kids

Size Large kids
$14.99 $32
Old Navy Size 10

View Product: Old Navy Size 10

Old Navy

Size 10
$14.99 $27
Gap Kids Size 4

View Product: Gap Kids Size 4

Gap Kids

Size 4
$13.99 $32
UV Skinz Size 7

View Product: UV Skinz Size 7

UV Skinz

Size 7
$8.99 $27
Gap Kids Size 10

View Product: Gap Kids Size 10

Gap Kids

Size 10
$12.99 $32
Ralph Lauren Size 18 mo

View Product: Ralph Lauren Size 18 mo

Ralph Lauren

Size 18 mo
$9.99 $22
Gap Kids Size Large kids

View Product: Gap Kids Size Large kids

Gap Kids

Size Large kids
$12.99 $32
Cat & Jack Size Small youth

View Product: Cat & Jack Size Small youth

Cat & Jack

Size Small youth
$9.99 $13
Quiksilver Size 12 mo

View Product: Quiksilver Size 12 mo

Quiksilver

Size 12 mo
$8.99 $15
Old Navy Size 8

View Product: Old Navy Size 8

Old Navy

Size 8
$14.99 $27
Lands' End Size 3T

View Product: Lands' End Size 3T

Lands' End

Size 3T
$10.99 $18
Old Navy Size Large kids

View Product: Old Navy Size Large kids

Old Navy

Size Large kids
$14.99 $27
Vineyard Vines Size 6-12 mo

View Product: Vineyard Vines Size 6-12 mo

Vineyard Vines

Size 6-12 mo
$10.99 $18
Gap Kids Size Large kids

View Product: Gap Kids Size Large kids

Gap Kids

Size Large kids
$13.99 $32
Hurley Size 7

View Product: Hurley Size 7

Hurley

Size 7
$11.99 $33
Hurley Size 14

View Product: Hurley Size 14

Hurley

Size 14
$12.99 $33
Old Navy Size 8

View Product: Old Navy Size 8

Old Navy

Size 8
$12.99 $27
Cat & Jack Size 8

View Product: Cat & Jack Size 8

Cat & Jack

Size 8
$6.99 $13
Old Navy Size X-Large youth
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View Product: Old Navy Size X-Large youth

Old Navy

Size X-Large youth
$10.99 $27

$5.49 50% off with

Carter's Size 3T

View Product: Carter's Size 3T

Carter's

Size 3T
$11.99 $30

$7.19 40% off with

Old Navy Size 4T

View Product: Old Navy Size 4T

Old Navy

Size 4T
$11.99 $18

$7.19 40% off with

Gap Size X-Small  kids
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View Product: Gap Size X-Small kids

Gap

Size X-Small kids
$10.99 $27

$5.49 50% off with

Gymboree Size 6
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View Product: Gymboree Size 6

Gymboree

Size 6
$10.99 $27

$5.49 50% off with

Scotch & Soda Size 8
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View Product: Scotch & Soda Size 8

Scotch & Soda

Size 8
$21.99 $44

$10.99 50% off with

Free Country Size 12
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View Product: Free Country Size 12

Free Country

Size 12
$17.99 $49

$7.20 60% off with

Nike Size Small youth
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View Product: Nike Size Small youth

Nike

Size Small youth
$24.99 $39

$14.99 40% off with

True Religion Size Medium kids
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View Product: True Religion Size Medium kids

True Religion

Size Medium kids
$11.99 $65

$4.80 60% off with

Carter's Size 18 mo
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View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$11.99 $30

$5.99 50% off with

Kanu Surf Size 16
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View Product: Kanu Surf Size 16

Kanu Surf

Size 16
$13.99 $33

$6.99 50% off with

Assorted Brands Size X-Small youth

View Product: Assorted Brands Size X-Small youth

Assorted Brands

Size X-Small youth
$15.99 $33

$9.59 40% off with

Gap Kids Size Small kids
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View Product: Gap Kids Size Small kids

Gap Kids

Size Small kids
$12.99 $32

$6.49 50% off with

Disney Size 6
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View Product: Disney Size 6

Disney

Size 6
$8.99 $31

$5.39 40% off with

Old Navy Size 18

View Product: Old Navy Size 18

Old Navy

Size 18
$13.99 $27

$8.39 40% off with

Hawke & Co. Size 10

View Product: Hawke & Co. Size 10

Hawke & Co.

Size 10
$13.99 $33

$8.39 40% off with

Gap Kids Size 4

View Product: Gap Kids Size 4

Gap Kids

Size 4
$12.99 $32

$7.79 40% off with

Assorted Brands Size 3-6 mo
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View Product: Assorted Brands Size 3-6 mo

Assorted Brands

Size 3-6 mo
$12.99 $44

$5.20 60% off with

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