1,700+ results
- Buc-ee's Kids 4T Space Print Swim Trunks with Pockets BlackOpens in a new window or tabPre-Owned$7.99or Best Offer+$4.71 delivery
- Rip Curl Little Boys/ Board Shorts/Swim Trunks Size 4 - BlackOpens in a new window or tabPre-Owned$7.96or Best Offer+$4.84 delivery
- NWT AUTHENTIC VILEBREQUIN SWIM TRUNKS - WATER REACTIVE SEAHORSE - KIDS - 4 YEARSOpens in a new window or tabBrand New$65.00or Best Offer+$5.95 delivery in 2-4 daysFree returns
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- NWT Vilebrequin France Surfing Turtles Green Swim Shorts Youth Trunks Sz 4Opens in a new window or tabBrand New$65.00or Best Offer+$4.84 delivery
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- Speedo Boys Swim Rash Guard Neon Green UV Block Burn Sz XSOpens in a new window or tabPre-Owned$9.99or Best Offer+$4.84 delivery
- Nike Performance Swimwear Amp Axis Boys Jammer Size 22 Age 6-7 XS - Black/GreenOpens in a new window or tabBrand New$15.99or Best OfferFree deliveryFree returns
- Chubbies The Lil Swimmers | XS Youth 6/7 Teal SharksOpens in a new window or tabPre-Owned$32.00or Best Offer+$4.57 delivery
- Mojang Minecraft Size 4 Boys Swim Trunks Upf +50 Comfort Liner New quick dryOpens in a new window or tabBrand New$22.99or Best Offer+$4.99 delivery
- Vineyard Vines Size 4T Swim Trunk, Lined, Red & Blue Seahorse Ocean PrintOpens in a new window or tabPre-Owned$14.00or Best Offer+$4.52 delivery
- NWT Minnow Swim Boys Size 3/4t Orange Stripe BoardiesOpens in a new window or tabBrand New$30.00or Best Offer+$4.84 delivery
- Hurley Boy's 4 Way Stretch Quick Dry Swim Shorts size L (10-12) SharksOpens in a new window or tabPre-Owned$8.00or Best Offer+$6.95 delivery
- UV SKINZ green short sleeve UV Rash Guard Shirt Youth 4TOpens in a new window or tabPre-Owned$15.00Was: $49.9970% offor Best Offer+$6.95 delivery$10 off every 3 items
- Vintage Patsy Aiken Designs Kids Toddler Shorts Golf Color Block Swim ShortsOpens in a new window or tabPre-Owned$14.49or Best Offer+$6.55 deliveryFree returnsExtra 10% off with coupon
- Psycho Bunny Maybrook Bunny Print Little Boy 4 XXXSOpens in a new window or tabPre-Owned$14.99or Best Offer+$6.50 deliveryFree returnsTop Rated Plus
- Mickey Mouse Boy's Size 4T Long Sleeve Rash Guard and Swim Trunk 2 Piece UPF+ 50Opens in a new window or tabBrand New$14.99or Best Offer+$6.95 delivery
- Janie and Jack Boys Recycled Striped Swim Trunk Shorts Beach Blue White Size 4Opens in a new window or tabPre-Owned$21.00or Best Offer+$5.50 delivery
- Vineyard Vines Boys Chappy Swim Trunks Size 4T Swim Suit Seahorse Print BeachOpens in a new window or tabPre-Owned$22.00or Best Offer+$6.55 delivery
- Boys 4 Art Class Hybrid Black Swim Trunks Board ShortsOpens in a new window or tabPre-Owned$9.00or Best Offer+$4.52 delivery
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Based on number of views and purchases | Sponsored- VilebrequinBrand New$65.00+$5.95 delivery
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- GapPre-Owned$20.20Free delivery
- PatagoniaBrand New$44.00+$5.89 deliveryExtra 23% off
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- NikeBrand New$11.99+$4.30 delivery
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- Vineyard Vines Outward Whole Blue Size 4T Printed Chappie TrunksOpens in a new window or tabBrand New$19.97or Best OfferFree delivery
- Wild About Me Blanks Boutique Boys Size 4T Seersucker Swim Trunks Lot Of 2Opens in a new window or tabPre-Owned$3.99Time left5d 18hor Best Offer+$4.71 delivery
- Psycho Bunny Green Stowell Swim Trunks Size 5-6 XSmall Multi Color Boys ShortsOpens in a new window or tabPre-Owned$22.00or Best Offer+$4.57 delivery
- Disney Swim Trunks Toddler Size 4T Mickey Mouse American Flag Beach PoolOpens in a new window or tabPre-Owned$15.99or Best OfferFree delivery
- Hurley • Size 4 Boys • Beach Pool Summer • Shorts • GreenOpens in a new window or tabPre-Owned$9.99or Best Offer+$4.99 delivery
- Devoropa Boy's Square Leg Swim Shorts - UPF 50+, quick dry - NWT - Size XSOpens in a new window or tabBrand New$15.00or Best Offer+$7.00 delivery
- Disney Shorts Boys Size 4T Multicolor Pixar Cars Swim TrunksOpens in a new window or tabPre-Owned$3.82Was: $4.4915% offor Best Offer+$5.70 deliveryFree returnsTop Rated Plus
- Boden Boys 9 Yr Swim Trunks Sea Life Elastic Drawstring Waist Pockets MulticolorOpens in a new window or tabPre-Owned$15.59or Best Offer+$6.55 delivery
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- Polo By Ralph Lauren Kids Boys Adjustable Elastic Waist Lined Swim Trunks Sz 4Opens in a new window or tabPre-Owned$27.99or Best OfferFree deliveryFree returns
- Kanu Surf Viper Quick Dry Swim TrunksOpens in a new window or tabBrand New$14.00or Best Offer+$4.00 deliveryFree returnsTop Rated Plus
- Disney Mickey Mouse Swim Trunks Size 4 Plaid Summer Adventure SPF 50 Pool BeachOpens in a new window or tabPre-Owned$9.50or Best Offer+$6.40 delivery
- 3 Piece Lot Of Boys Baby Gap Swimsuits Size 4T/XSOpens in a new window or tabPre-Owned$9.50Time left6dor Best Offer+$7.15 delivery
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- NWT Ralph Lauren Boys Sz 4 Green Swim Shorts Trunks Sanibel Big Pony Pockets N45Opens in a new window or tabBrand New$32.20Was: $46.0030% offor Best Offer+$4.71 delivery
- SSLR American Flag Board Shorts Size XSOpens in a new window or tabBrand New$18.00or Best Offer+$4.00 deliveryFree returnsTop Rated Plus
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- Mickey Mouse Trunks Kids Size 4 Disney Tropical Swimming For Summer UPF 50 +Opens in a new window or tabBrand New$12.00or Best Offer+$6.55 delivery
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- Hurley Boy's Youth Boardshorts Surf Size 4 swim shorts trunks (MSRP $38)Opens in a new window or tabBrand New$24.99or Best Offer+$6.40 delivery
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- BOYS CAT & JACK LONG SLEEVE SWIM SHIRT XS(4/5)Opens in a new window or tabPre-Owned$0.99Time left1d 17hor Best Offer+$5.95 delivery
- New Vintage Boys Boy’s Size 4 XS X-Small Radical Skinz Rashguard Swim SwimsuitOpens in a new window or tabBrand New$0.99Time left14h 27mor Best Offer+$4.50 delivery
- Grave Digger Swim Shirt Size 4Opens in a new window or tabPre-Owned$3.00Time left4h 5mor Best Offer+$4.84 delivery
- Lands End Swim Trunks With Hydroliner 2 Trunks Boys Size XS 4-5Opens in a new window or tabPre-Owned$10.00Time left3d 7hor Best Offer+$5.80 delivery
- HURLEY BOY'S PULL ON SWIM SHORTS, MULTICOLOR *CHECK FOR SIZE BinZ02Opens in a new window or tabBrand New$12.99or Best OfferFree delivery
- ZeroXposur Youth Rash Guard Swim Shirt Sun Top Size 4 Neon Green UPF 50+Opens in a new window or tabBrand New$12.56Was: $14.9516% offor Best Offer+$5.50 delivery in 2-4 days
- Hyperflex Unisex Access 2MM Spring Wetsuit Kids 4 Blue Green Flatlock SeamsOpens in a new window or tabPre-Owned$21.88or Best Offer+$5.68 deliveryFree returnsTop Rated Plus
- Disney Parks Bathing Suit Boy's 4 Toy Story Lined Woody SporkyOpens in a new window or tabPre-Owned$8.99or Best Offer+$5.99 delivery
- Patagonia Baggies Board Shorts Yellow Green Leaf Print XSOpens in a new window or tabPre-Owned$11.99or Best Offer+$6.55 delivery
- Prodoh Boys Boogie Board Swim Trunks - Blue Tropical Breeze Boat Print 4TOpens in a new window or tabPre-Owned$32.00or Best Offer+$4.84 delivery
- Boys Cat And Jack 4t Swim Trunks —Safari PrintOpens in a new window or tabPre-Owned$5.00or Best Offer+$4.84 delivery
- Star Wars 4T boys Mandalorian Toddler Swim Trunks and Rashguard Set new tagsOpens in a new window or tabBrand New$31.49Was: $44.9930% offor Best Offer+$7.99 delivery
- Nike Performance Swimwear Amp Axis Boys Jammer Size 22 Age 6-7 XS - Black/BlueOpens in a new window or tabBrand New$15.99or Best OfferFree deliveryFree returns
- Janie And Jack Anchor Print Swim Trunks Size 4 Youth Mesh Lined Red BlueOpens in a new window or tabPre-Owned$22.59or Best Offer+$6.19 delivery
- Rip Curl Kids Rash Guard Summer suit Size 4Opens in a new window or tabBrand New$25.00or Best Offer+$4.52 delivery
- Swim Trunks NEW WITH TAGS Boys Size 4/5 (XS) by Cat & Jack, Tie Dye, UPF 50+Opens in a new window or tabBrand New$10.49or Best Offer+$5.62 delivery
- Lilly Pulitzer Boys Capri Swim Trunks Pink Blue White Lavender Size XSOpens in a new window or tabPre-Owned$22.99or Best Offer+$5.99 delivery
- Youth Swim Trunks Rip Curl Mirage Boys Boardshorts Size 4-6 XS Pineapple AOP NWTOpens in a new window or tabBrand New$19.02Was: $23.7720% offor Best OfferFree delivery in 2-4 days
- Disney Store Toy Story Rash Guard Boys 4 Shirt Forky Swimwear Long Sleeve NWTOpens in a new window or tabBrand New$18.00Was: $20.0010% offor Best Offer+$7.00 delivery
- Cat & Jack Graphic Print Short Sleeve Shirt Boys Sz 4T and Swimming Trunks Sz 3TOpens in a new window or tabPre-Owned$20.00or Best Offer+$4.84 delivery
- Lego Star Wars Theme Boy's Swim Trunks Sz 4 Star Wars 100% Polyester DrawstringOpens in a new window or tabNew (Other)$3.99or Best Offer+$5.85 delivery
- New! Janie & Jack Boys Size 4 Flamingo Swim Trunks Shorts Suit UPF 50 NWT $42Opens in a new window or tabBrand New$19.95or Best Offer+$6.10 delivery in 2-3 days
- Molo Nike Power Boat Kids Swim Trunks Size 134/140 MSRP $77Opens in a new window or tabPre-Owned$40.00or Best Offer+$4.84 delivery
- Mini Boden Boys 3-4 Yr Swim Trunks With Matching Rash guardOpens in a new window or tabPre-Owned$18.00or Best Offer+$4.84 delivery
- Sonic The Hedgehog Boys 4 Graphic UPF 50+ Short Sleeve Rash Guard Swim Tee NWTOpens in a new window or tabBrand New$13.32Was: $15.6715% offor Best Offer+$5.99 deliveryFree returnsExtra 15% off with couponTop Rated Plus
- Hanna Anderson boys swim trunks size 4 or 100 cm palm trees surfboardsOpens in a new window or tabPre-Owned$18.00or Best Offer+$5.57 delivery
- Speedo Competitive Swimwear Fast Skins FSII Black Jammer 7050153 Boys Size 22Opens in a new window or tabBrand New$44.95or Best Offer+$7.00 delivery in 2-4 days
- Arizona Jean Co. Boys Rash Guard Size XS 6/7Opens in a new window or tabBrand New$12.00or Best Offer+$4.00 deliveryFree returnsTop Rated Plus
- There Abouts Swim Trunks Size XS 6/7Opens in a new window or tabBrand New$18.00or Best Offer+$4.00 deliveryFree returnsTop Rated Plus
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