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      • Boys' Clothing (Sizes 4 & Up)
        • Selected categorySwimwear
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387 results

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    • 2XSRemove filter
    • Size: 12Remove filter
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    • Speedo Mid Length Redondo Swimsuit Size XXS (4/5)
      Speedo Mid Length Redondo Swimsuit Size XXS (4/5)
      Opens in a new window or tab
      Brand New
      $25.00
      or Best Offer
      +$4.00 delivery
      Located in United States
      Free returns
      Sponsored
      Top Rated Plus
    • Gymboree Swim Trunks Large 10 - 12 Lobster Beach Board Shorts Drawstring
      Gymboree Swim Trunks Large 10 - 12 Lobster Beach Board Shorts Drawstring
      Opens in a new window or tab
      Pre-Owned
      $12.99
      or Best Offer
      +$5.99 delivery
      Located in United States
      Sponsored
    • BOY’S JOHNNIE-O SWIM TRUNKS - SIZE 12
      BOY’S JOHNNIE-O SWIM TRUNKS - SIZE 12
      Opens in a new window or tab
      Pre-Owned
      $16.00
      Was: $20.0020% off
      or Best Offer
      +$6.55 delivery
      Located in United States
      Sponsored
    • Boys Swimwear Sport Bathing Suit One Piece Swimsuit Dinosaur Print Wetsuit
      Boys Swimwear Sport Bathing Suit One Piece Swimsuit Dinosaur Print Wetsuit
      Opens in a new window or tab
      New (Other)
      $13.63 to $24.19
      Was: $26.8912% off
      Buy It Now
      +$3.99 delivery
      Located in China
      Sponsored
    • Big Chill UPF 50+ Rash Guard Shirt Boy's Orange w/ palm trees 10/12
      Big Chill UPF 50+ Rash Guard Shirt Boy's Orange w/ palm trees 10/12
      Opens in a new window or tab
      Brand New
      $4.16
      0 bids · Time left1d 11h
      +$5.85 delivery
      Located in United States
      Free returns
      Sponsored
      Top Rated Plus
    • Art Class Boy's Size 12 Ebony Crown Swim Trunks UPF 50+ Blue Gray
      Art Class Boy's Size 12 Ebony Crown Swim Trunks UPF 50+ Blue Gray
      Opens in a new window or tab
      Brand New
      $10.95
      or Best Offer
      Free delivery
      Located in United States
      Free returns
      Save up to 20% when you buy more
      Sponsored
    • Big Chill UPF 50+ Rash Guard Shirt Boy's Light Blue Size 12 Pre-Owned
      Big Chill UPF 50+ Rash Guard Shirt Boy's Light Blue Size 12 Pre-Owned
      Opens in a new window or tab
      Pre-Owned
      $5.00
      Buy It Now
      +$4.84 delivery
      Located in United States
      Sponsored
    • Art Class Boy's Size 12 Husky Turquoise Hybrid Swim Shorts Trunks Board Shorts
      Art Class Boy's Size 12 Husky Turquoise Hybrid Swim Shorts Trunks Board Shorts
      Opens in a new window or tab
      Brand New
      $6.50
      Buy It Now
      +$4.50 delivery
      Located in United States
      2 watchers
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    • Boys OP Rash Guard Swim Shirt Short Sleeve Black Blue Tropical, Size L, 10/12
      Boys OP Rash Guard Swim Shirt Short Sleeve Black Blue Tropical, Size L, 10/12
      Opens in a new window or tab
      Pre-Owned
      $6.99
      Buy It Now
      +$4.63 delivery
      Located in United States
      Sponsored
    • Member’s Mark Boys Two Piece Rash Guard & Swim Trunks Size 10/12
      Member’s Mark Boys Two Piece Rash Guard & Swim Trunks Size 10/12
      Opens in a new window or tab
      Pre-Owned
      $13.00
      or Best Offer
      +$5.80 delivery
      Located in United States
      Sponsored
    • Boy's Youth Hurley Phantom Board Shorts Swim NEW
      Boy's Youth Hurley Phantom Board Shorts Swim NEW
      Opens in a new window or tab
      Brand New
      $22.99
      Buy It Now
      Free delivery in 2-4 days
      Located in United States
      Free returns
      Sponsored
      Top Rated Plus
    • NWT JOHNNIE-O $55 BOYS CARVE HALF ELASTIC SWIM SHORTS TRUNKS IN MARLIN SZ 12
      NWT JOHNNIE-O $55 BOYS CARVE HALF ELASTIC SWIM SHORTS TRUNKS IN MARLIN SZ 12
      Opens in a new window or tab
      Brand New
      $19.99
      Buy It Now
      +$5.95 delivery
      Located in United States
      Free returns
      Last one
      Sponsored
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    • Size 12 Youth Crewcuts by jcrew boys navy blue, blue and green Fish swim trunks
      Size 12 Youth Crewcuts by jcrew boys navy blue, blue and green Fish swim trunks
      Opens in a new window or tab
      Pre-Owned
      $12.95
      or Best Offer
      +$6.55 delivery
      Located in United States
      Sponsored
    • Boys Swimsuit Long Sleeve Bathing Suit Diving Swimwear Comfortable Bodysuit
      Boys Swimsuit Long Sleeve Bathing Suit Diving Swimwear Comfortable Bodysuit
      Opens in a new window or tab
      New (Other)
      $14.89 to $24.89
      Buy It Now
      +$3.99 delivery
      Located in China
      Sponsored
    • Kids Boy Swimwear One Piece Swimsuit UPF 50+ Rash Guard Long Sleeve Wetsuit
      Kids Boy Swimwear One Piece Swimsuit UPF 50+ Rash Guard Long Sleeve Wetsuit
      Opens in a new window or tab
      New (Other)
      $10.94 to $29.25
      Was: $29.698% off
      Buy It Now
      +$3.99 delivery
      Located in China
      Sponsored
    • Kids Boys Print Swimsuit 2Pcs Chilrd Top Trunks Swim Shorts Swimwear Rash Guard
      Kids Boys Print Swimsuit 2Pcs Chilrd Top Trunks Swim Shorts Swimwear Rash Guard
      Opens in a new window or tab
      New (Other)
      $18.65 to $19.88
      Was: $22.5912% off
      Buy It Now
      +$3.99 delivery
      Located in China
      Sponsored
    • Boys Swimwear Beach Swimsuit Sport Bathing Suit Swimming Wetsuit Sun Protection
      Boys Swimwear Beach Swimsuit Sport Bathing Suit Swimming Wetsuit Sun Protection
      Opens in a new window or tab
      New (Other)
      $9.39 to $24.62
      Was: $25.496% off
      Buy It Now
      Free delivery
      Located in China
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    • Hurley® Phantom Pavones |  Big Boys' 16" Blue Black Board Shorts Swim Trunks
      Hurley® Phantom Pavones | Big Boys' 16" Blue Black Board Shorts Swim Trunks
      Opens in a new window or tab
      Brand New
      $14.90
      Buy It Now
      +$3.95 delivery in 2-4 days
      Located in United States
      1+ watchers
      Sponsored
    • Hanna Anderson Unisex Aqua Blue Short Sleeve Rash Guard Top Size 150 (Size 12)
      Hanna Anderson Unisex Aqua Blue Short Sleeve Rash Guard Top Size 150 (Size 12)
      Opens in a new window or tab
      New (Other)
      $16.35
      or Best Offer
      +$6.95 delivery
      Located in United States
      Sponsored
    • Volcom Mod Tech Boys Swim Shorts 12Y/26 Geometric Orange Gray Drawstring Pocket
      Volcom Mod Tech Boys Swim Shorts 12Y/26 Geometric Orange Gray Drawstring Pocket
      Opens in a new window or tab
      Pre-Owned
      $9.59
      Was: $11.9920% off
      or Best Offer
      +$6.20 delivery in 2-4 days
      Located in United States
      Sponsored
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      Based on number of views and purchases | Sponsored
        • Speedo Mid Length Redondo Swimsuit Size XXS (4/5)
          Speedo
          Speedo Mid Length Redondo Swimsuit Size XXS (4/5)
          Brand New
          $25.00
          +$4.00 delivery
        • Hurley® Phantom Pavones |  Big Boys' 16" Blue Black Board Shorts Swim Trunks
          Hurley
          Hurley® Phantom Pavones | Big Boys' 16" Blue Black Board Shorts Swim Trunks
          Brand New
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        • Boy's Youth Hurley Phantom Board Shorts Swim NEW
          Hurley
          Boy's Youth Hurley Phantom Board Shorts Swim NEW
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        • Art Class Boy's Size 12 Ebony Crown Swim Trunks UPF 50+ Blue Gray
          Art
          Art Class Boy's Size 12 Ebony Crown Swim Trunks UPF 50+ Blue Gray
          Brand New
          $10.95
          Free delivery
          Save up to 20% when you buy more
        • Boys 12 Hybrid Swim Shorts Adjustable Waist Pockets Black Stripes Art Class NWOT
          Art
          Boys 12 Hybrid Swim Shorts Adjustable Waist Pockets Black Stripes Art Class NWOT
          Pre-Owned
          $11.00
          +$6.40 delivery
        • Speedo Boy’s Black Jammer Swimsuit Bottoms Size 12
          Speedo
          Speedo Boy’s Black Jammer Swimsuit Bottoms Size 12
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    • Boys Billabong Crossfire Submersibles Hybrid Shorts Size M (12) Navy Blue NWT
      Boys Billabong Crossfire Submersibles Hybrid Shorts Size M (12) Navy Blue NWT
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      Pre-Owned
      $16.00
      or Best Offer
      +$6.55 delivery
      Located in United States
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    • SPYDER 3 Pc Boys Swim Set Rashguard UPF 30+ Sun Protection, Size M 10/12
      SPYDER 3 Pc Boys Swim Set Rashguard UPF 30+ Sun Protection, Size M 10/12
      Opens in a new window or tab
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      $18.00
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      +$7.01 delivery
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    • NWT HANNA ANDERSSON SWIM TRUNKS SWIMSUIT SWIMMING SHARKS EQUATOR BLUE 150 12
      NWT HANNA ANDERSSON SWIM TRUNKS SWIMSUIT SWIMMING SHARKS EQUATOR BLUE 150 12
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      $24.99
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    • Boy Swimsuit Bathing Suit Jumpsuit One Piece Bodysuit Surfing Uniform UPF 50+
      Boy Swimsuit Bathing Suit Jumpsuit One Piece Bodysuit Surfing Uniform UPF 50+
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      $12.13 to $20.78
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      +$3.99 delivery
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    • Vintage Summer Swimwear Palm Tree Trunks Size 12 2312
      Vintage Summer Swimwear Palm Tree Trunks Size 12 2312
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    • Eddie Bauer Swim Trunk Navy Blue and Green Kids Youth Boys Size 10/12
      Eddie Bauer Swim Trunk Navy Blue and Green Kids Youth Boys Size 10/12
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      $9.41
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      +$4.71 delivery
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    • B Spirt Boys Swim Shorts NWT Size 12
      B Spirt Boys Swim Shorts NWT Size 12
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      Brand New
      $12.00
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    • Boy's Youth Volcom Modtech 4 Way Stretch Board Shorts Swim size 12 (26) new
      Boy's Youth Volcom Modtech 4 Way Stretch Board Shorts Swim size 12 (26) new
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    • QUICKSILVER Graphic Print Sleeveless Gold Swim & Surfing Tank Top Boy's Size 12
      QUICKSILVER Graphic Print Sleeveless Gold Swim & Surfing Tank Top Boy's Size 12
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      Pre-Owned
      $14.70
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    • Boys O’Neill Rashguard Compression Shorts New 50+ Size 12 $30
      Boys O’Neill Rashguard Compression Shorts New 50+ Size 12 $30
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      $18.75
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    • Wave Zone Cute Soft Stretchy Blue/White Swim T-Shirt size 10/12
      Wave Zone Cute Soft Stretchy Blue/White Swim T-Shirt size 10/12
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      $19.50
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      Located in United States
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    • LL Bean Kids Boys 12 Large Board Shorts Swim Bathing Suit Mesh Liner
      LL Bean Kids Boys 12 Large Board Shorts Swim Bathing Suit Mesh Liner
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      $14.99
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      +$6.55 delivery
      Located in United States
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    • Johnnie O Swim Trunks Boys Youth 12 Striped Mesh Lined Pockets
      Johnnie O Swim Trunks Boys Youth 12 Striped Mesh Lined Pockets
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      $12.95
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      +$10.55 delivery
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    • NWT JOHNNIE-O $55 BOYS VESSUP HALF ELASTIC SWIM SHORTS TRUNKS IN TWILIGHT SZ 12
      NWT JOHNNIE-O $55 BOYS VESSUP HALF ELASTIC SWIM SHORTS TRUNKS IN TWILIGHT SZ 12
      Opens in a new window or tab
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    • Art Class Boys Hybrid Swim Shorts Adj waist UPF Pockets Green Size 12 Husky New
      Art Class Boys Hybrid Swim Shorts Adj waist UPF Pockets Green Size 12 Husky New
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    • Hanna Andersson Star Wars Rash Guard Size 12 150 CM Darth Vader Black Red
      Hanna Andersson Star Wars Rash Guard Size 12 150 CM Darth Vader Black Red
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    • Rip-Curl All Time Re-Mix Boardshorts Boys 12 Blue Striped Swim Trunks 26” Waist
      Rip-Curl All Time Re-Mix Boardshorts Boys 12 Blue Striped Swim Trunks 26” Waist
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    • SPEEDO Boy's Swimsuit Jammer Begin to Swim Trunks Turquoise Navy Size 12
      SPEEDO Boy's Swimsuit Jammer Begin to Swim Trunks Turquoise Navy Size 12
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      Boys Casualwear Hawaiian Beachwear 3Pcs Swimsuit Casual Shorts Beach Shirt Hat
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    • Kids Boys Swimwear Summer Rash Guard Outfits Swimsuit Diving Beachwear Party
      Kids Boys Swimwear Summer Rash Guard Outfits Swimsuit Diving Beachwear Party
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      Kids One-piece Short Sleeves Swimsuit Rash Guard Bathing Suit Wetsuit Swimwear
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      Art Class Swim Shorts Boys 12 Husky Teal Adjustable Waist Webbed Pockets NWT
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      NWT Speedo Boys Solid Powerflex Youth Brief Red Size 26 10/12
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      Spyder Boys Blue Tie Dye Lined Swimming Trunks Shorts Size Medium 10/12
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    • Tea Collection Boy's Long Sleeve Whale Blue Ivory Striped Swim Rash Guard Sz 12
      Tea Collection Boy's Long Sleeve Whale Blue Ivory Striped Swim Rash Guard Sz 12
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      Hanna Andersson Boys 150 Youth Large Swim Shirt Rash Guard Short Sleeve Blue EUC
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      Caribbean Joe Board Shorts Swim Trunks Boys 12 Turquoise Fish Print Mesh Lined
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      NWT JOHNNIE-O $55 BOYS TRELLIS HALF ELASTIC SWIM SHORTS TRUNKS IN MARLIN SZ 12
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      CABANA LIFE Big Boy's 8, 12 Long Sleeve Colorblock Blue Rashguard Shirt NWT
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      Kids Boys Swimsuit Seaside Swimwear Fish Print Wetsuit Diving Bathing Suit 2Pcs
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      NWT JOHNNIE-O $55 BOYS MALLON HALF ELASTIC SWIM SHORTS TRUNKS IN NANTUCKET SZ 12
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      Wailoa Board Shorts Boys Size 12. Black/white 26” Waist
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