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Shop Boy’s Sweaters at up to 90% off estimated retail! thredUP has a huge selection of gently used Boy’s Sweaters from brands like Gymboree, Baby Gap or Polo by Ralph Lauren at thredUP.

CottonRemove filter12-18 moRemove filter
67 items
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    Disney for Baby Gap Cardigan (view 2)Disney for Baby Gap Cardigan (view 1)
    View Product: Disney for Baby Gap Cardigan

    Disney for Baby Gap

    Cardigan
    Size 12-18 mo
    $11.99 $6.59 45% off with code GOBIG
    58% off estimated retail
    Zara Pullover Sweater (view 2)Zara Pullover Sweater (view 1)
    View Product: Zara Pullover Sweater

    Zara

    Pullover Sweater
    Size 12-18 mo
    $16.99 $9.34 45% off with code GOBIG
    52% off estimated retail
    Janie and Jack Pullover Sweater (view 2)Janie and Jack Pullover Sweater (view 1)
    View Product: Janie and Jack Pullover Sweater

    Janie and Jack

    Pullover Sweater
    Size 12-18 mo
    $15.99 $8.79 45% off with code GOBIG
    69% off estimated retail
    United Colors Of Benetton Zip Up Hoodie (view 2)United Colors Of Benetton Zip Up Hoodie (view 1)New With Tags
    View Product: United Colors Of Benetton Zip Up Hoodie

    United Colors Of Benetton

    Zip Up Hoodie
    Size 12-18 mo
    $13.99 $7.69 45% off with code GOBIG
    51% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Hanna Andersson Zip Up Hoodie (view 2)Hanna Andersson Zip Up Hoodie (view 1)
    View Product: Hanna Andersson Zip Up Hoodie

    Hanna Andersson

    Zip Up Hoodie
    Size 12-18 mo
    $25.99 $14.29 45% off with code GOBIG
    45% off estimated retail
    Janie and Jack Sweatshirt (view 2)Janie and Jack Sweatshirt (view 1)
    View Product: Janie and Jack Sweatshirt

    Janie and Jack

    Sweatshirt
    Size 12-18 mo
    $12.99 $7.14 45% off with code GOBIG
    66% off estimated retail
    Splendid Cardigan (view 2)Splendid Cardigan (view 1)
    View Product: Splendid Cardigan

    Splendid

    Cardigan
    Size 12-18 mo
    $14.99 $8.24 45% off with code GOBIG
    72% off estimated retail
    Baker by Ted Baker Cardigan (view 2)Baker by Ted Baker Cardigan (view 1)
    View Product: Baker by Ted Baker Cardigan

    Baker by Ted Baker

    Cardigan
    Size 12-18 mo
    $17.99 $9.89 45% off with code GOBIG
    60% off estimated retail
    Hanna Andersson Pullover Sweater (view 2)Hanna Andersson Pullover Sweater (view 1)Flawed Gem
    View Product: Hanna Andersson Pullover Sweater

    Hanna Andersson

    Pullover Sweater
    Size 12-18 mo
    $24.99 $13.74 45% off with code GOBIG
    51% off estimated retail
    Splendid Zip Up Hoodie (view 2)Splendid Zip Up Hoodie (view 1)
    View Product: Splendid Zip Up Hoodie

    Splendid

    Zip Up Hoodie
    Size 12-18 mo
    $17.99 $9.89 45% off with code GOBIG
    65% off estimated retail
    childhoods Sweatshirt (view 2)childhoods Sweatshirt (view 1)
    View Product: childhoods Sweatshirt

    childhoods

    Sweatshirt
    Size 12-18 mo
    $14.99 $8.24 45% off with code GOBIG
    65% off estimated retail
    Zara Baby Cardigan (view 2)Zara Baby Cardigan (view 1)
    View Product: Zara Baby Cardigan

    Zara Baby

    Cardigan
    Size 12-18 mo
    $13.99 $7.69 45% off with code GOBIG
    61% off estimated retail
    Splendid Sweatshirt (view 2)Splendid Sweatshirt (view 1)
    View Product: Splendid Sweatshirt

    Splendid

    Sweatshirt
    Size 12-18 mo
    $16.99 $9.34 45% off with code GOBIG
    68% off estimated retail
    Janie and Jack Pullover Sweater (view 2)Janie and Jack Pullover Sweater (view 1)
    View Product: Janie and Jack Pullover Sweater

    Janie and Jack

    Pullover Sweater
    Size 12-18 mo
    $18.99 $10.44 45% off with code GOBIG
    63% off estimated retail
    Janie and Jack Turtleneck Sweater (view 2)Janie and Jack Turtleneck Sweater (view 1)
    View Product: Janie and Jack Turtleneck Sweater

    Janie and Jack

    Turtleneck Sweater
    Size 12-18 mo
    $11.99 $6.59 45% off with code GOBIG
    73% off estimated retail
    Janie and Jack Pullover Sweater (view 2)Janie and Jack Pullover Sweater (view 1)
    View Product: Janie and Jack Pullover Sweater

    Janie and Jack

    Pullover Sweater
    Size 12-18 mo
    $15.99 $8.79 45% off with code GOBIG
    69% off estimated retail
    Tea Zip Up Hoodie (view 2)Tea Zip Up Hoodie (view 1)
    View Product: Tea Zip Up Hoodie

    Tea

    Zip Up Hoodie
    Size 12-18 mo
    $15.99 $8.79 45% off with code GOBIG
    61% off estimated retail
    Gap Zip Up Hoodie (view 2)Gap Zip Up Hoodie (view 1)
    View Product: Gap Zip Up Hoodie

    Gap

    Zip Up Hoodie
    Size 12-18 mo
    $15.99 $8.79 45% off with code GOBIG
    51% off estimated retail
    Hanna Andersson Sweatshirt (view 2)Hanna Andersson Sweatshirt (view 1)
    View Product: Hanna Andersson Sweatshirt

    Hanna Andersson

    Sweatshirt
    Size 12-18 mo
    $16.99 $9.34 45% off with code GOBIG
    58% off estimated retail
    Gymboree Zip Up Hoodie (view 2)Gymboree Zip Up Hoodie (view 1)
    View Product: Gymboree Zip Up Hoodie

    Gymboree

    Zip Up Hoodie
    Size 12-18 mo
    $12.99 $7.14 45% off with code GOBIG
    64% off estimated retail
    Baby Gap Pullover Hoodie (view 2)Baby Gap Pullover Hoodie (view 1)
    View Product: Baby Gap Pullover Hoodie

    Baby Gap

    Pullover Hoodie
    Size 12-18 mo
    $15.99 $8.79 45% off with code GOBIG
    50% off estimated retail
    Andy & Evan Zip Up Hoodie (view 2)Andy & Evan Zip Up Hoodie (view 1)
    View Product: Andy & Evan Zip Up Hoodie

    Andy & Evan

    Zip Up Hoodie
    Size 12-18 mo
    $18.99 $10.44 45% off with code GOBIG
    73% off estimated retail
    Hanna Andersson Zip Up Hoodie (view 2)Hanna Andersson Zip Up Hoodie (view 1)
    View Product: Hanna Andersson Zip Up Hoodie

    Hanna Andersson

    Zip Up Hoodie
    Size 12-18 mo
    $19.99 $10.99 45% off with code GOBIG
    60% off estimated retail
    Angel Dear Cardigan (view 2)Angel Dear Cardigan (view 1)
    View Product: Angel Dear Cardigan

    Angel Dear

    Cardigan
    Size 12-18 mo
    $10.99 $6.04 45% off with code GOBIG
    69% off estimated retail
    Zara Cardigan (view 2)Zara Cardigan (view 1)
    View Product: Zara Cardigan

    Zara

    Cardigan
    Size 12-18 mo
    $15.99 $8.79 45% off with code GOBIG
    55% off estimated retail
    Zara Baby Pullover Sweater (view 2)Zara Baby Pullover Sweater (view 1)
    View Product: Zara Baby Pullover Sweater

    Zara Baby

    Pullover Sweater
    Size 12-18 mo
    $14.99 $8.24 45% off with code GOBIG
    58% off estimated retail
    Baby Gap Zip Up Hoodie (view 2)Baby Gap Zip Up Hoodie (view 1)
    View Product: Baby Gap Zip Up Hoodie

    Baby Gap

    Zip Up Hoodie
    Size 12-18 mo
    $15.99 $8.79 45% off with code GOBIG
    50% off estimated retail
    Joules Pullover Sweater (view 2)Joules Pullover Sweater (view 1)
    View Product: Joules Pullover Sweater

    Joules

    Pullover Sweater
    Size 12-18 mo
    $19.99 $10.99 45% off with code GOBIG
    78% off estimated retail
    H&M Pullover Sweater (view 2)H&M Pullover Sweater (view 1)
    View Product: H&M Pullover Sweater

    H&M

    Pullover Sweater
    Size 12-18 mo
    $8.99 $4.94 45% off with code GOBIG
    20% off estimated retail
    Janie and Jack Sweater Vest (view 2)Janie and Jack Sweater Vest (view 1)
    View Product: Janie and Jack Sweater Vest

    Janie and Jack

    Sweater Vest
    Size 12-18 mo
    $12.99 $7.14 45% off with code GOBIG
    69% off estimated retail
    Baby B'gosh Cardigan (view 2)Baby B'gosh Cardigan (view 1)
    View Product: Baby B'gosh Cardigan

    Baby B'gosh

    Cardigan
    Size 12-18 mo
    $8.99 $4.94 45% off with code GOBIG
    50% off estimated retail
    Janie and Jack Pullover Sweater (view 2)Janie and Jack Pullover Sweater (view 1)
    View Product: Janie and Jack Pullover Sweater

    Janie and Jack

    Pullover Sweater
    Size 12-18 mo
    $19.99 $10.99 45% off with code GOBIG
    61% off estimated retail
    Janie and Jack Pullover Sweater (view 2)Janie and Jack Pullover Sweater (view 1)
    View Product: Janie and Jack Pullover Sweater

    Janie and Jack

    Pullover Sweater
    Size 12-18 mo
    $19.99 $10.99 45% off with code GOBIG
    61% off estimated retail
    Nest Organic Pullover Sweater (view 2)Nest Organic Pullover Sweater (view 1)
    View Product: Nest Organic Pullover Sweater

    Nest Organic

    Pullover Sweater
    Size 12-18 mo
    $15.99 $8.79 45% off with code GOBIG
    70% off estimated retail
    Janie and Jack Sweatshirt (view 2)Janie and Jack Sweatshirt (view 1)Flawed Gem
    View Product: Janie and Jack Sweatshirt

    Janie and Jack

    Sweatshirt
    Size 12-18 mo
    $9.99 $5.49 45% off with code GOBIG
    77% off estimated retail
    Baby Gap Pullover Sweater (view 2)Baby Gap Pullover Sweater (view 1)
    View Product: Baby Gap Pullover Sweater

    Baby Gap

    Pullover Sweater
    Size 12-18 mo
    $14.99 $8.24 45% off with code GOBIG
    59% off estimated retail
    Baby Gap Zip Up Hoodie (view 2)Baby Gap Zip Up Hoodie (view 1)
    View Product: Baby Gap Zip Up Hoodie

    Baby Gap

    Zip Up Hoodie
    Size 12-18 mo
    $14.99 $8.24 45% off with code GOBIG
    53% off estimated retail
    Janie and Jack Sweatshirt (view 2)Janie and Jack Sweatshirt (view 1)
    View Product: Janie and Jack Sweatshirt

    Janie and Jack

    Sweatshirt
    Size 12-18 mo
    $16.99 $9.34 45% off with code GOBIG
    67% off estimated retail
    Baby Gap Pullover Sweater (view 2)Baby Gap Pullover Sweater (view 1)
    View Product: Baby Gap Pullover Sweater

    Baby Gap

    Pullover Sweater
    Size 12-18 mo
    $18.99 $10.44 45% off with code GOBIG
    48% off estimated retail
    The Little White Company Pullover Sweater (view 2)The Little White Company Pullover Sweater (view 1)
    View Product: The Little White Company Pullover Sweater

    The Little White Company

    Pullover Sweater
    Size 12-18 mo
    $10.99 $6.04 45% off with code GOBIG
    69% off estimated retail
    Dr. Seuss Pullover Hoodie (view 2)Dr. Seuss Pullover Hoodie (view 1)
    View Product: Dr. Seuss Pullover Hoodie

    Dr. Seuss

    Pullover Hoodie
    Size 12-18 mo
    $9.99 $5.49 45% off with code GOBIG
    33% off estimated retail
    Crewcuts Zip Up Hoodie (view 2)Crewcuts Zip Up Hoodie (view 1)
    View Product: Crewcuts Zip Up Hoodie

    Crewcuts

    Zip Up Hoodie
    Size 12-18 mo
    $12.99 $7.14 45% off with code GOBIG
    70% off estimated retail
    Gymboree Pullover Sweater (view 2)Gymboree Pullover Sweater (view 1)
    View Product: Gymboree Pullover Sweater

    Gymboree

    Pullover Sweater
    Size 12-18 mo
    $13.99 $7.69 45% off with code GOBIG
    60% off estimated retail
    Armani Junior Sweatshirt (view 2)Armani Junior Sweatshirt (view 1)
    View Product: Armani Junior Sweatshirt

    Armani Junior

    Sweatshirt
    Size 12-18 mo
    $65.99 $36.29 45% off with code GOBIG
    64% off estimated retail
    BabyGear Pullover Sweater (view 2)BabyGear Pullover Sweater (view 1)
    View Product: BabyGear Pullover Sweater

    BabyGear

    Pullover Sweater
    Size 12-18 mo
    $9.99 $5.49 45% off with code GOBIG
    44% off estimated retail
    Zara Cardigan (view 2)Zara Cardigan (view 1)
    View Product: Zara Cardigan

    Zara

    Cardigan
    Size 12-18 mo
    $20.99 $11.54 45% off with code GOBIG
    53% off estimated retail
    Canadiana Clothing Co. Zip Up Hoodie (view 2)Canadiana Clothing Co. Zip Up Hoodie (view 1)
    View Product: Canadiana Clothing Co. Zip Up Hoodie

    Canadiana Clothing Co.

    Zip Up Hoodie
    Size 12-18 mo
    $6.99 $3.84 45% off with code GOBIG
    61% off estimated retail
    Gymboree Pullover Sweater (view 2)Gymboree Pullover Sweater (view 1)Price Drop
    View Product: Gymboree Pullover Sweater

    Gymboree

    Pullover Sweater
    Size 12-18 mo
    $15.99 $8.79 45% off with code GOBIG
    54% off estimated retail
    Assorted Brands Pullover Sweater (view 2)Assorted Brands Pullover Sweater (view 1)Price Drop
    View Product: Assorted Brands Pullover Sweater

    Assorted Brands

    Pullover Sweater
    Size 12-18 mo
    $16.99 $9.34 45% off with code GOBIG
    55% off estimated retail
    Jm Originals Sweatshirt (view 2)Jm Originals Sweatshirt (view 1)
    View Product: Jm Originals Sweatshirt

    Jm Originals

    Sweatshirt
    Size 12-18 mo
    $10.99 $6.04 45% off with code GOBIG
    26% off estimated retail
    Pact Zip Up Hoodie (view 2)Pact Zip Up Hoodie (view 1)
    View Product: Pact Zip Up Hoodie

    Pact

    Zip Up Hoodie
    Size 12-18 mo
    $13.99 $7.69 45% off with code GOBIG
    40% off estimated retail
    Janie and Jack Sweater Vest (view 2)Janie and Jack Sweater Vest (view 1)Price Drop
    View Product: Janie and Jack Sweater Vest

    Janie and Jack

    Sweater Vest
    Size 12-18 mo
    $12.99 $7.14 45% off with code GOBIG
    69% off estimated retail
    Assorted Brands Sweatshirt (view 2)Assorted Brands Sweatshirt (view 1)Price Drop
    View Product: Assorted Brands Sweatshirt

    Assorted Brands

    Sweatshirt
    Size 12-18 mo
    $10.99 $6.04 45% off with code GOBIG
    65% off estimated retail
    Old Navy Zip Up Hoodie (view 2)Old Navy Zip Up Hoodie (view 1)Price Drop
    View Product: Old Navy Zip Up Hoodie

    Old Navy

    Zip Up Hoodie
    Size 12-18 mo
    $8.99 $4.94 45% off with code GOBIG
    50% off estimated retail
    The Children's Place Pullover Sweater (view 2)The Children's Place Pullover Sweater (view 1)Price Drop
    View Product: The Children's Place Pullover Sweater

    The Children's Place

    Pullover Sweater
    Size 12-18 mo
    $11.99 $6.59 45% off with code GOBIG
    55% off estimated retail
    Tots Zip Up Hoodie (view 2)Tots Zip Up Hoodie (view 1)
    View Product: Tots Zip Up Hoodie

    Tots

    Zip Up Hoodie
    Size 12-18 mo
    $7.99 $4.39 45% off with code GOBIG
    60% off estimated retail
    Old Navy Pullover Hoodie (view 2)Old Navy Pullover Hoodie (view 1)Price Drop
    View Product: Old Navy Pullover Hoodie

    Old Navy

    Pullover Hoodie
    Size 12-18 mo
    $7.99 $4.39 45% off with code GOBIG
    55% off estimated retail
    Assorted Brands Zip Up Hoodie (view 2)Assorted Brands Zip Up Hoodie (view 1)Price Drop
    View Product: Assorted Brands Zip Up Hoodie

    Assorted Brands

    Zip Up Hoodie
    Size 12-18 mo
    $9.99 $5.49 45% off with code GOBIG
    65% off estimated retail
    Baby Gap Pullover Hoodie (view 2)Baby Gap Pullover Hoodie (view 1)Price Drop
    View Product: Baby Gap Pullover Hoodie

    Baby Gap

    Pullover Hoodie
    Size 12-18 mo
    $10.99 $6.04 45% off with code GOBIG
    65% off estimated retail
    Gymboree Zip Up Hoodie (view 2)Gymboree Zip Up Hoodie (view 1)Price Drop
    View Product: Gymboree Zip Up Hoodie

    Gymboree

    Zip Up Hoodie
    Size 12-18 mo
    $11.99 $6.59 45% off with code GOBIG
    67% off estimated retail
    Old Navy Cardigan (view 2)Old Navy Cardigan (view 1)Price Drop
    View Product: Old Navy Cardigan

    Old Navy

    Cardigan
    Size 12-18 mo
    $10.99 $6.04 45% off with code GOBIG
    47% off estimated retail
    Old Navy Zip Up Hoodie (view 2)Old Navy Zip Up Hoodie (view 1)Price Drop
    View Product: Old Navy Zip Up Hoodie

    Old Navy

    Zip Up Hoodie
    Size 12-18 mo
    $8.99 $4.94 45% off with code GOBIG
    50% off estimated retail
    Hanes Zip Up Hoodie (view 2)Hanes Zip Up Hoodie (view 1)Price Drop
    View Product: Hanes Zip Up Hoodie

    Hanes

    Zip Up Hoodie
    Size 12-18 mo
    $9.99 $5.49 45% off with code GOBIG
    40% off estimated retail
    Old Navy Pullover Hoodie (view 2)Old Navy Pullover Hoodie (view 1)Price Drop
    View Product: Old Navy Pullover Hoodie

    Old Navy

    Pullover Hoodie
    Size 12-18 mo
    $9.99 $5.49 45% off with code GOBIG
    44% off estimated retail
    Baby Gap Outlet Zip Up Hoodie (view 2)Baby Gap Outlet Zip Up Hoodie (view 1)Price Drop
    View Product: Baby Gap Outlet Zip Up Hoodie

    Baby Gap Outlet

    Zip Up Hoodie
    Size 12-18 mo
    $8.99 $4.94 45% off with code GOBIG
    40% off estimated retail
    Fagottino Pullover Hoodie (view 2)Fagottino Pullover Hoodie (view 1)
    View Product: Fagottino Pullover Hoodie

    Fagottino

    Pullover Hoodie
    Size 12-18 mo
    $8.99 $4.94 45% off with code GOBIG
    55% off estimated retail
    Feel It Cardigan (view 2)Feel It Cardigan (view 1)Price Drop
    View Product: Feel It Cardigan

    Feel It

    Cardigan
    Size 12-18 mo
    $7.99 $4.39 45% off with code GOBIG
    69% off estimated retail
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