2,900+ results
- Boys Secret Wishes Smocked Swim Trunks Size 4Opens in a new window or tabPre-Owned$8.00Was: $10.0020% offor Best Offer+$5.00 delivery
- Mickey Mouse Boy's 2 Piece UPF+ 50 Long Sleeve Rash Guard and Swim Trunk SetOpens in a new window or tabBrand New$14.00Buy It NowFree deliverySave up to 20% when you buy more
- Volcom Board Shorts Boys Size 4T Multicolor Abstract Drawstring Beach SurferOpens in a new window or tabPre-Owned$9.57Was: $15.9540% offor Best Offer+$5.95 delivery in 2-4 daysFree returnsExtra 20% off with couponTop Rated Plus
- Hurley Boy's UPF50+ Drawstring Waist Pull On Swim ShortOpens in a new window or tabBrand New$10.99Buy It NowFree deliverySave up to 20% when you buy more
- Vineyard Vines Chappy Swim Trunk Shorts Boys Size 4T Blue Pink LinedOpens in a new window or tabPre-Owned$12.00or Best Offer+$4.84 delivery
- Hurley Boy's UPF50+ Drawstring Waist Pull On Swim ShortOpens in a new window or tabBrand New$14.99List price: $38.0061% offBuy It NowFree delivery in 2-4 daysFree returnsSave up to 30% when you buy moreTop Rated Plus
- Hurley Youth Boy's UPF 50+ Long Sleeve Rash Guard Swim TopOpens in a new window or tabBrand New$12.99List price: $26.0050% offBuy It NowFree delivery in 2-4 daysFree returnsSave up to 30% when you buy moreTop Rated Plus
- Bucees Swim Trunks Board Shorts Graphic Black Checkered Stretch Boys Size 4TOpens in a new window or tabPre-Owned$3.990 bids · Time left20h$8.99Buy It Now+$3.99 delivery
Picked For You
Top selling items from trusted sellers | Sponsored- Buc-ees lined Swim Trunks Boys Size 4T, Red w/Logo, 3 Pockets. Swimsuit, shortsOpens in a new window or tabPre-Owned$9.99or Best Offer+$5.09 delivery
- Mickey Mouse Boy's 2 Piece UPF+ 50 Long Sleeve Rash Guard and Swim Trunk SetOpens in a new window or tabBrand New$19.99List price: $30.0033% offBuy It NowFree delivery in 2-4 daysFree returnsSave up to 30% when you buy moreTop Rated Plus
- Rip Curl Little Boys 4 Swim Swimsuit Surf Toddler Blue Kids Zip Up 4t SwimmingOpens in a new window or tabPre-Owned$14.95or Best Offer+$5.99 delivery
- Binki Bro Harada Swimsuit In Blue Little Boys Size 4T, Brand NewOpens in a new window or tabBrand New$24.65Was: $29.0015% offor Best OfferFree deliveryFree returnsLast oneTop Rated Plus
- Under Armour NWT BOYS Atomic Wave Stripe Volley Swim Trunks Shorts 2TOpens in a new window or tabBrand New$15.00or Best OfferFree deliveryFree returnsTop Rated Plus
- Bella Bliss Swim Trunks Boys Size 4Opens in a new window or tabBrand New$18.00or Best Offer+$4.84 delivery
- Under Armour NWT BOYS Atomic Wave Stripe Volley Swim Trunks Shorts 4Opens in a new window or tabBrand New$14.00or Best OfferFree deliveryFree returnsTop Rated Plus
- Boys Polo Ralph Lauren multi-coloured swim shorts #polo #swim #beach #poolOpens in a new window or tabPre-Owned$18.00or Best Offer+$4.84 delivery
- Miles The Label Boys “ Sun’s Out Surf’s Up “ Swim Set 4 YOOpens in a new window or tabPre-Owned$29.00Buy It Now+$6.55 delivery
- NWT Crewcuts by J. Crew Little Boys Blue Candy Print Swim Trunks sz 4Opens in a new window or tabBrand New$15.00Buy It Now+$4.49 delivery
- Little English Boys Swim Trunks 4TOpens in a new window or tabBrand New$5.190 bids · Time left1d 9h$13.24Buy It Now+$4.51 delivery
From our popular brands
Based on number of views and purchases | Sponsored- Polo Ralph Lauren Boys Sz 4T Swim Trunks Green Board ShortsOpens in a new window or tabPre-Owned$6.97Was: $9.9530% offBuy It Now+$4.95 delivery
- Matilda Jane Boys Size 4 Swim Trunks Shorts Lemon Print Mesh Brief Pool BeachOpens in a new window or tabPre-Owned$8.96Was: $9.9510% offBuy It NowFree delivery
- Ruffle Butts Rugged Butts Floral Swim Trunks Boys Size 4T NWT Red BlueOpens in a new window or tabBrand New$19.99or Best Offer+$5.51 delivery
- Wild About Me Blanks Boutique Boys Size 4T Seersucker Swim Trunks Lot Of 2Opens in a new window or tabPre-Owned$3.990 bids · Time left2d 20hor Best Offer+$4.71 delivery
- New Disney boys swimwear swim suit bottoms shorts Mickey Mouse Sz 4 UPF50+Opens in a new window or tabBrand New$7.99or Best Offer+$4.99 deliveryFree returnsTop Rated Plus
- Boys Hurley Swimsuit & Lee Quick Dry Cargo Hiking Shorts, 4/5Opens in a new window or tabPre-Owned$8.00Buy It Now+$7.35 delivery
- Gymboree Boys Black Skull Short Sleeve Rashguard Swim Shirt Size 4Opens in a new window or tabPre-Owned$5.990 bids · Time left9d 23h$8.99Buy It Now+$4.75 delivery
- Despicable Me Minion Rash Guard Swim Shirt Built In UPF Protection Size 4TOpens in a new window or tabBrand New$3.57Was: $3.9710% offBuy It Now+$5.65 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 deliveryFree returns
- One-Piece Children Swimsuits Kid Swimwear Boys Long Sleeve Sun Protection NewOpens in a new window or tabNew (Other)$26.99Was: $29.9910% offBuy It NowFree deliveryfrom China
- 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 $60
- Polo Ralph Lauren Polo Bear Performance Rash Guard Little Boy's 4 Multicolor L/SOpens in a new window or tabBrand New$27.83or Best Offer+$5.95 deliveryFree returnsTop Rated Plus
- Carter's Shark Swim Trunks Boys Size 4TOpens in a new window or tabPre-Owned$7.00or Best Offer+$8.14 delivery
- Crew Cuts SIZE 4 Blue Aqua Turtle Boy's Swim TrunksOpens in a new window or tabPre-Owned$14.00Buy It Now+$7.97 deliveryFree returns
- Vintage 80s Surfer Dude California Art Beach Boy's Size 4 Swimming Trunks ShortsOpens in a new window or tabPre-Owned$12.99or Best Offer+$4.99 deliveryFree returnsTop Rated Plus
- Bluey size 4 boys swim trunks new with tagsOpens in a new window or tabBrand New$12.99or Best Offer+$4.84 delivery
- Billabong x Dr. Seuss Lorax Boys Size S / 4 yrs Swim Trunks Board Shorts KidsOpens in a new window or tabPre-Owned$14.50Buy It Now+$4.60 delivery
- Hurley Boy's 4 Way Stretch Quick Dry Back Pocket Swim ShortsOpens in a new window or tabBrand New$14.98List price: $38.0061% offBuy It NowFree delivery in 2-4 daysFree returnsSave up to 30% when you buy moreTop Rated Plus
- NWT AUTHENTIC VILEBREQUIN SWIM TRUNKS - WATER REACTIVE - KIDS- BLUE - 4 YEARSOpens in a new window or tabBrand New$65.00or Best Offer+$5.95 deliveryFree returns
- Boy Sunsuit Surfing Shirts With Boardshorts Cover Up Swimsuit UPF 50+ Sets SwimOpens in a new window or tabNew (Other)$11.77 to $32.20Was: $29.995% offBuy It NowFree deliveryfrom China
- Minnow Boys Swim Size 3T-4T Swimsuit Purple, Blue And White PlaidOpens in a new window or tabPre-Owned$20.00Buy It Now+$6.55 delivery
- P.S. from Aeropostale Boys Swim Set with Short Sleeve RashguardOpens in a new window or tabBrand New$12.99List price: $17.9928% offBuy It NowFree delivery in 2-3 daysFree returns4+ watchersTop Rated Plus
- Hurley Youth Boy's UPF 50+ H2O Dri Fit Long Sleeve Rash Guard Swim TopOpens in a new window or tabBrand New$12.99List price: $26.0050% offBuy It NowFree delivery in 2-4 daysFree returnsSave up to 30% when you buy moreTop Rated Plus
- Batman boys swimsuit Rash Guard Bathing suit Batman Kids 3Pc Swim Set UPF 50+Opens in a new window or tabBrand New$19.99Buy It NowFree deliverySave up to 10% when you buy more
- NWT Under Armour swim set size 4 5 7Opens in a new window or tabBrand New$31.00Buy It NowFree delivery
- Boy's Nike 3 Brand Polyester Swim Shorts Swimsuit NEWOpens in a new window or tabBrand New$21.99Buy It NowFree delivery in 2-4 daysFree returnsTop Rated Plus
- Spider-Man Swinging Action Youth Swim Shorts & Rash Guard Set Multi-ColorOpens in a new window or tabBrand New$19.99Buy It NowFree delivery
- Body Glove Boys Size 4 Swim Shirt & ShortsOpens in a new window or tabPre-Owned$10.00or Best Offer+$5.00 delivery
- Paw Patrol Swim Trunks Bathing Suit Yellow Blue Chase Rubble Size 4t 4 toddlerOpens in a new window or tabPre-Owned$7.99Buy It Now+$5.99 delivery
- Love Brand & Co Two Peas in a Pod Swim Shorts Trunks Blue Boys Size 4-6Opens in a new window or tabPre-Owned$19.99Buy It Now+$5.00 delivery in 2-3 daysFree returnsTop Rated Plus
- Hurley Youth Long Sleeve UPF 50+ Swim Top Black Size 4Opens in a new window or tabBrand New$9.95Buy It NowFree delivery
- Boys Hurley Colorful Logo Swim Shorts 4T NewOpens in a new window or tabBrand New$16.98or Best Offer+$3.98 delivery in 2-4 days
- Ocean Pacific Swim Trunks Boys 4 Red Classic Cars Palm Tree Lined OP ShortsOpens in a new window or tabPre-Owned$6.29Was: $6.9910% offor Best Offer+$4.99 deliveryFree returnsTop Rated Plus
- NINJA TURLES Swim Trunks UPF-50+ Bathing Suit NWT Boys Sizes 4, 5-6 or 7 $25Opens in a new window or tabBrand New$15.99Buy It Now+$4.95 delivery in 2-4 daysFree returnsSave up to 20% when you buy moreTop Rated Plus
- Boy's Youth Hurley 2 Piece UPF 50+ H2O Dri Swim Long Sleeve Shirt Swim NewOpens in a new window or tabBrand New$24.99Buy It NowFree delivery in 2-4 daysFree returnsTop Rated Plus
- Hurley Long Sleeve Dri-Fit UPF 50+ Shirt Black, Boy's Swim Top, SELECT SIZEOpens in a new window or tabBrand New$14.88Was: $16.007% offBuy It NowFree deliverySave up to 25% when you buy more
- BODEN Mini Boys Size 4 4Y Swim Shorts Trunks Sea Ocean Animal Fish Shark BeachOpens in a new window or tabPre-Owned$14.99or Best Offer+$5.99 delivery in 2-3 days
- Vintage Y2K Scooby Doo Croc Attack Kids Swim Trunks Boy Shorts Size 4T NWTOpens in a new window or tabBrand New$10.80Was: $12.0010% offor Best Offer+$5.65 delivery
- Character Toddler Boys 2-Piece Rashguard and Swim Trunk Set (Sonic, 4T)Opens in a new window or tabBrand New$19.99List price: $30.0033% offBuy It NowFree delivery in 2-4 daysFree returnsTop Rated Plus
- Star Wars Mandalorian Baby Yoda Boy's Long Sleeve Splash Guard/Swim Trunk, 2pcOpens in a new window or tabBrand New$22.98List price: $32.5029% offBuy It NowFree delivery in 2-4 daysFree returnsTop Rated Plus
- Member's Mark Boy's 4-Way Stretch Quick Dry Resort Swim TrunkOpens in a new window or tabBrand New$10.99List price: $30.0063% offBuy It NowFree delivery in 2-4 daysFree returnsTop Rated Plus
- Teenage Mutant Ninja Turtles TMNT Boys Swim Trunks Shorts 4T Kids NickelodeonOpens in a new window or tabPre-Owned$10.00or Best Offer+$5.00 delivery
- Boys Hurley American Flag swim Board Shorts, Size 4 adjustable waistOpens in a new window or tabPre-Owned$12.23Was: $16.9928% offor Best OfferFree deliveryFree returns
- Hurley Boys Size 4T Swim TrunksOpens in a new window or tabPre-Owned$8.500 bids · Time left3d 11hor Best Offer+$4.51 delivery
- Hurley Youth Boy's UPF 50+ H2O Dri Fit Long Sleeve Rash Guard Swim Top Black 4Opens in a new window or tabBrand New$10.36Was: $12.9520% offBuy It NowFree delivery
- Anavini Smocked Needlepoint Collection Swim Trunk Blue White Gingham Boys Size 4Opens in a new window or tabPre-Owned$13.99Buy It Now+$5.75 delivery
- Boys Surf Shorts Size 4 Swim Drawstring Hook And Loop Pockets Blue PolyesterOpens in a new window or tabBrand New$5.99or Best Offer+$4.99 deliveryFree returnsTop Rated Plus
- Disney Pixar Finding Nemo Boy's Bathing Swimming Swim Suit Trunks New Size 4Opens in a new window or tabBrand New$14.99or Best Offer+$4.99 deliveryFree returnsTop Rated Plus
- HURLEY BOY'S SWIM TRUNK, AURORA GREEN CHECK FOR SIZE BinO03Opens in a new window or tabBrand New$9.99Buy It Now+$6.40 deliverySave up to 10% when you buy more
- Boys Size 4T Swim Trunks 100% Polyester Elastic Waist SwimwearOpens in a new window or tabPre-Owned$3.99Buy It Now+$5.95 delivery
- NEW Art Class Target Black W/ Grey Stripes Swim Suit Bottoms Shorts Boys size 4Opens in a new window or tabBrand New$14.99Buy It NowFree delivery
- NWT E-LAND KIDS BOYS size 4 LIGHT BLUE & PURPLE TROPICAL HAWAIIAN SWIM TRUNKSOpens in a new window or tabBrand New$21.15Was: $23.5010% offBuy It NowFree delivery
- Dolfin Size 4 Boys Swim Trunks Bottoms Yellow With Cars & DrawstringOpens in a new window or tabPre-Owned$3.75Was: $5.0025% offor Best Offer+$5.00 delivery
- Nickelodean Sponge Bob Boys Swim Shorts**Bright Yellow**Inner Lining**2 SizesOpens in a new window or tabBrand New$8.00or Best Offer+$5.80 delivery
- Psycho Bunny Maybrook Bunny Print Little Boy 4 XXXSOpens in a new window or tabPre-Owned$17.99or Best Offer+$6.50 deliveryFree returnsTop Rated Plus
- BIRDWELL BEACH BRITCHES BOYS BOARDSHORTS YOUTH KIDS TODDLER SIZE 4Opens in a new window or tabPre-Owned$40.00Buy It NowFree delivery
- Items Per Page