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Boys' tops come in such a variety of styles and colors, they're the perfect way to start planning an entire outfit. Shop at thredUP when you're looking for an excellent selection of like-new boys' tops that range from casual to dressy and at prices up to 90% off estimated retail.

6XRemove filter12-18 moRemove filter
61 items
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    Zara Baby Short Sleeve T-Shirt (view 2)Zara Baby Short Sleeve T-Shirt (view 1)
    View Product: Zara Baby Short Sleeve T-Shirt

    Zara Baby

    Short Sleeve T-Shirt
    Size 12-18 mo
    $8.99
    40% off estimated retail
    Baby Gap Short Sleeve Button-Down Shirt (view 2)Baby Gap Short Sleeve Button-Down Shirt (view 1)
    View Product: Baby Gap Short Sleeve Button-Down Shirt

    Baby Gap

    Short Sleeve Button-Down Shirt
    Size 12-18 mo
    $11.99
    55% off estimated retail
    Janie and Jack Short Sleeve Button-Down Shirt (view 2)Janie and Jack Short Sleeve Button-Down Shirt (view 1)
    View Product: Janie and Jack Short Sleeve Button-Down Shirt

    Janie and Jack

    Short Sleeve Button-Down Shirt
    Size 12-18 mo
    $14.99
    61% off estimated retail
    Assorted Brands Pullover Sweater (view 2)Assorted Brands Pullover Sweater (view 1)
    View Product: Assorted Brands Pullover Sweater

    Assorted Brands

    Pullover Sweater
    Size 12-18 mo
    $13.99
    61% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Mori Short Sleeve T-Shirt (view 2)Mori Short Sleeve T-Shirt (view 1)
    View Product: Mori Short Sleeve T-Shirt

    Mori

    Short Sleeve T-Shirt
    Size 12-18 mo
    $9.99
    54% off estimated retail
    Mori Short Sleeve T-Shirt (view 2)Mori Short Sleeve T-Shirt (view 1)
    View Product: Mori Short Sleeve T-Shirt

    Mori

    Short Sleeve T-Shirt
    Size 12-18 mo
    $9.99
    54% off estimated retail
    Mori Short Sleeve T-Shirt (view 2)Mori Short Sleeve T-Shirt (view 1)
    View Product: Mori Short Sleeve T-Shirt

    Mori

    Short Sleeve T-Shirt
    Size 12-18 mo
    $10.99
    50% off estimated retail
    Baby Gap Long Sleeve Button-Down Shirt (view 2)Baby Gap Long Sleeve Button-Down Shirt (view 1)
    View Product: Baby Gap Long Sleeve Button-Down Shirt

    Baby Gap

    Long Sleeve Button-Down Shirt
    Size 12-18 mo
    $10.99 $8.79 20% off with code SHINE
    59% off estimated retail
    Baby Gap One Piece Snowsuit (view 2)Baby Gap One Piece Snowsuit (view 1)
    View Product: Baby Gap One Piece Snowsuit

    Baby Gap

    One Piece Snowsuit
    Size 12-18 mo
    $33.99 $27.19 20% off with code SHINE
    63% off estimated retail
    Janie and Jack Short Sleeve Button-Down Shirt (view 2)Janie and Jack Short Sleeve Button-Down Shirt (view 1)
    View Product: Janie and Jack Short Sleeve Button-Down Shirt

    Janie and Jack

    Short Sleeve Button-Down Shirt
    Size 12-18 mo
    $9.99 $7.99 20% off with code SHINE
    74% off estimated retail
    Baby Gap Short Sleeve T-Shirt (view 2)Baby Gap Short Sleeve T-Shirt (view 1)
    View Product: Baby Gap Short Sleeve T-Shirt

    Baby Gap

    Short Sleeve T-Shirt
    Size 12-18 mo
    $11.99 $9.59 20% off with code SHINE
    25% off estimated retail
    Gymboree Long Sleeve Button-Down Shirt (view 2)Gymboree Long Sleeve Button-Down Shirt (view 1)
    View Product: Gymboree Long Sleeve Button-Down Shirt

    Gymboree

    Long Sleeve Button-Down Shirt
    Size 12-18 mo
    $10.99 $8.79 20% off with code SHINE
    59% off estimated retail
    TU Short Sleeve T-Shirt (view 2)TU Short Sleeve T-Shirt (view 1)
    View Product: TU Short Sleeve T-Shirt

    TU

    Short Sleeve T-Shirt
    Size 12-18 mo
    $10.99 $8.79 20% off with code SHINE
    38% off estimated retail
    Janie and Jack Long Sleeve Henley (view 2)Janie and Jack Long Sleeve Henley (view 1)
    View Product: Janie and Jack Long Sleeve Henley

    Janie and Jack

    Long Sleeve Henley
    Size 12-18 mo
    $14.99 $11.99 20% off with code SHINE
    58% off estimated retail
    Janie and Jack Long Sleeve Button-Down Shirt (view 2)Janie and Jack Long Sleeve Button-Down Shirt (view 1)
    View Product: Janie and Jack Long Sleeve Button-Down Shirt

    Janie and Jack

    Long Sleeve Button-Down Shirt
    Size 12-18 mo
    $12.99 $10.39 20% off with code SHINE
    66% off estimated retail
    childhoods Long Sleeve T-Shirt (view 2)childhoods Long Sleeve T-Shirt (view 1)
    View Product: childhoods Long Sleeve T-Shirt

    childhoods

    Long Sleeve T-Shirt
    Size 12-18 mo
    $7.99 $6.39 20% off with code SHINE
    63% 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 $10.39 35% off with code SHINE
    70% off estimated retail
    Janie and Jack Long Sleeve Button-Down Shirt (view 2)Janie and Jack Long Sleeve Button-Down Shirt (view 1)
    View Product: Janie and Jack Long Sleeve Button-Down Shirt

    Janie and Jack

    Long Sleeve Button-Down Shirt
    Size 12-18 mo
    $12.99 $10.39 20% off with code SHINE
    66% off estimated retail
    Tea Long Sleeve Button-Down Shirt (view 2)Tea Long Sleeve Button-Down Shirt (view 1)
    View Product: Tea Long Sleeve Button-Down Shirt

    Tea

    Long Sleeve Button-Down Shirt
    Size 12-18 mo
    $18.99 $14.24 25% off with code SHINE
    54% 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 $11.24 25% off with code SHINE
    53% off estimated retail
    Uniqlo Tank Top (view 2)Uniqlo Tank Top (view 1)
    View Product: Uniqlo Tank Top

    Uniqlo

    Tank Top
    Size 12-18 mo
    $6.99 $5.59 20% off with code SHINE
    36% off estimated retail
    Uniqlo Tank Top (view 2)Uniqlo Tank Top (view 1)
    View Product: Uniqlo Tank Top

    Uniqlo

    Tank Top
    Size 12-18 mo
    $6.99 $5.59 20% off with code SHINE
    36% off estimated retail
    Hanna Andersson Pullover Sweater (view 2)Hanna Andersson Pullover Sweater (view 1)
    View Product: Hanna Andersson Pullover Sweater

    Hanna Andersson

    Pullover Sweater
    Size 12-18 mo
    $23.99 $16.79 30% off with code SHINE
    55% 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 $11.89 30% off with code SHINE
    67% off estimated retail
    Baby Boden Long Sleeve Button-Down Shirt (view 2)Baby Boden Long Sleeve Button-Down Shirt (view 1)
    View Product: Baby Boden Long Sleeve Button-Down Shirt

    Baby Boden

    Long Sleeve Button-Down Shirt
    Size 12-18 mo
    $16.99 $12.74 25% off with code SHINE
    52% 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
    $8.99 $6.74 25% off with code SHINE
    50% 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 $7.99 20% off with code SHINE
    33% off estimated retail
    Tooby Doo Short Sleeve Polo (view 2)Tooby Doo Short Sleeve Polo (view 1)
    View Product: Tooby Doo Short Sleeve Polo

    Tooby Doo

    Short Sleeve Polo
    Size 12-18 mo
    $8.99 $7.19 20% off with code SHINE
    59% off estimated retail
    Adidas Short Sleeve T-Shirt (view 2)Adidas Short Sleeve T-Shirt (view 1)
    View Product: Adidas Short Sleeve T-Shirt

    Adidas

    Short Sleeve T-Shirt
    Size 12-18 mo
    $10.99 $8.79 20% off with code SHINE
    42% off estimated retail
    Janie and Jack Short Sleeve Button-Down Shirt (view 2)Janie and Jack Short Sleeve Button-Down Shirt (view 1)
    View Product: Janie and Jack Short Sleeve Button-Down Shirt

    Janie and Jack

    Short Sleeve Button-Down Shirt
    Size 12-18 mo
    $13.99 $10.49 25% off with code SHINE
    64% off estimated retail
    Disney for Baby Gap Long Sleeve T-Shirt (view 2)Disney for Baby Gap Long Sleeve T-Shirt (view 1)
    View Product: Disney for Baby Gap Long Sleeve T-Shirt

    Disney for Baby Gap

    Long Sleeve T-Shirt
    Size 12-18 mo
    $6.99 $5.59 20% off with code SHINE
    53% off estimated retail
    Fagottino Pullover Sweater (view 2)Fagottino Pullover Sweater (view 1)
    View Product: Fagottino Pullover Sweater

    Fagottino

    Pullover Sweater
    Size 12-18 mo
    $13.99 $9.09 35% off with code SHINE
    48% off estimated retail
    Playtime Long Sleeve T-Shirt (view 2)Playtime Long Sleeve T-Shirt (view 1)
    View Product: Playtime Long Sleeve T-Shirt

    Playtime

    Long Sleeve T-Shirt
    Size 12-18 mo
    $8.99 $6.74 25% off with code SHINE
    18% off estimated retail
    Baby Gap Sweatshirt (view 2)Baby Gap Sweatshirt (view 1)
    View Product: Baby Gap Sweatshirt

    Baby Gap

    Sweatshirt
    Size 12-18 mo
    $10.99 $8.79 20% off with code SHINE
    59% off estimated retail
    Baby Gap One Piece Snowsuit (view 2)Baby Gap One Piece Snowsuit (view 1)
    View Product: Baby Gap One Piece Snowsuit

    Baby Gap

    One Piece Snowsuit
    Size 12-18 mo
    $41.99 $33.59 20% off with code SHINE
    55% off estimated retail
    Hart + Land Long Sleeve T-Shirt (view 2)Hart + Land Long Sleeve T-Shirt (view 1)
    View Product: Hart + Land Long Sleeve T-Shirt

    Hart + Land

    Long Sleeve T-Shirt
    Size 12-18 mo
    $11.99 $7.79 35% off with code SHINE
    66% off estimated retail
    Peek... Long Sleeve Button-Down Shirt (view 2)Peek... Long Sleeve Button-Down Shirt (view 1)
    View Product: Peek... Long Sleeve Button-Down Shirt

    Peek...

    Long Sleeve Button-Down Shirt
    Size 12-18 mo
    $15.99 $12.79 20% off with code SHINE
    63% off estimated retail
    Hope & Henry Pullover Sweater (view 2)Hope & Henry Pullover Sweater (view 1)Price Drop
    View Product: Hope & Henry Pullover Sweater

    Hope & Henry

    Pullover Sweater
    Size 12-18 mo
    $12.99 $9.09 30% off with code SHINE
    63% off estimated retail
    Old Navy Long Sleeve T-Shirt (view 2)Old Navy Long Sleeve T-Shirt (view 1)Price Drop
    View Product: Old Navy Long Sleeve T-Shirt

    Old Navy

    Long Sleeve T-Shirt
    Size 12-18 mo
    $12.99 $5.20 60% off with code SHINE
    $14
    Hart + Land Thermal Top (view 2)Hart + Land Thermal Top (view 1)
    View Product: Hart + Land Thermal Top

    Hart + Land

    Thermal Top
    Size 12-18 mo
    $9.99 $6.99 30% off with code SHINE
    72% off estimated retail
    Zara Short Sleeve Polo (view 2)Zara Short Sleeve Polo (view 1)
    View Product: Zara Short Sleeve Polo

    Zara

    Short Sleeve Polo
    Size 12-18 mo
    $12.99 $10.39 20% off with code SHINE
    51% off estimated retail
    Next Baby Long Sleeve T-Shirt (view 2)Next Baby Long Sleeve T-Shirt (view 1)
    View Product: Next Baby Long Sleeve T-Shirt

    Next Baby

    Long Sleeve T-Shirt
    Size 12-18 mo
    $7.99 $6.39 20% off with code SHINE
    $7
    Assorted Brands Sweatshirt (view 2)Assorted Brands Sweatshirt (view 1)Price Drop
    View Product: Assorted Brands Sweatshirt

    Assorted Brands

    Sweatshirt
    Size 12-18 mo
    $11.99 $8.99 25% off with code SHINE
    58% off estimated retail
    The Children's Place Short Sleeve T-Shirt (view 2)The Children's Place Short Sleeve T-Shirt (view 1)Price Drop
    View Product: The Children's Place Short Sleeve T-Shirt

    The Children's Place

    Short Sleeve T-Shirt
    Size 12-18 mo
    $8.99 $7.19 20% off with code SHINE
    35% 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 $6.39 20% off with code SHINE
    60% off estimated retail
    H&M Long Sleeve T-Shirt (view 2)H&M Long Sleeve T-Shirt (view 1)
    View Product: H&M Long Sleeve T-Shirt

    H&M

    Long Sleeve T-Shirt
    Size 12-18 mo
    $6.99 $5.59 20% off with code SHINE
    36% off estimated retail
    Old Navy Short Sleeve T-Shirt (view 2)Old Navy Short Sleeve T-Shirt (view 1)Price Drop
    View Product: Old Navy Short Sleeve T-Shirt

    Old Navy

    Short Sleeve T-Shirt
    Size 12-18 mo
    $8.99 $7.19 20% off with code SHINE
    10% 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 $7.99 20% off with code SHINE
    65% off estimated retail
    Shein Long Sleeve Button-Down Shirt (view 2)Shein Long Sleeve Button-Down Shirt (view 1)Price Drop
    View Product: Shein Long Sleeve Button-Down Shirt

    Shein

    Long Sleeve Button-Down Shirt
    Size 12-18 mo
    $9.99 $7.99 20% off with code SHINE
    33% off estimated retail
    Velvet + Tweed Long Sleeve Button-Down Shirt (view 2)Velvet + Tweed Long Sleeve Button-Down Shirt (view 1)Price Drop
    View Product: Velvet + Tweed Long Sleeve Button-Down Shirt

    Velvet + Tweed

    Long Sleeve Button-Down Shirt
    Size 12-18 mo
    $7.99 $6.39 20% off with code SHINE
    46% off estimated retail
    Old Navy Short Sleeve Button-Down Shirt (view 2)Old Navy Short Sleeve Button-Down Shirt (view 1)Price Drop
    View Product: Old Navy Short Sleeve Button-Down Shirt

    Old Navy

    Short Sleeve Button-Down Shirt
    Size 12-18 mo
    $9.99 $7.99 20% off with code SHINE
    37% off estimated retail
    Guess Baby Long Sleeve T-Shirt (view 2)Guess Baby Long Sleeve T-Shirt (view 1)Price Drop
    View Product: Guess Baby Long Sleeve T-Shirt

    Guess Baby

    Long Sleeve T-Shirt
    Size 12-18 mo
    $8.99 $7.19 20% off with code SHINE
    50% off estimated retail
    Baby Gap Long Sleeve Button-Down Shirt (view 2)Baby Gap Long Sleeve Button-Down Shirt (view 1)Price Drop
    View Product: Baby Gap Long Sleeve Button-Down Shirt

    Baby Gap

    Long Sleeve Button-Down Shirt
    Size 12-18 mo
    $9.99 $7.99 20% off with code SHINE
    63% off estimated retail
    Active by Old Navy Short Sleeve T-Shirt (view 2)Active by Old Navy Short Sleeve T-Shirt (view 1)Price Drop
    View Product: Active by Old Navy Short Sleeve T-Shirt

    Active by Old Navy

    Short Sleeve T-Shirt
    Size 12-18 mo
    $5.99 $4.79 20% off with code SHINE
    33% off estimated retail
    Crazy 8 Short Sleeve Button-Down Shirt (view 2)Crazy 8 Short Sleeve Button-Down Shirt (view 1)Price Drop
    View Product: Crazy 8 Short Sleeve Button-Down Shirt

    Crazy 8

    Short Sleeve Button-Down Shirt
    Size 12-18 mo
    $7.99 $6.39 20% off with code SHINE
    55% off estimated retail
    James Perse Short Sleeve Polo (view 2)James Perse Short Sleeve Polo (view 1)Price Drop
    View Product: James Perse Short Sleeve Polo

    James Perse

    Short Sleeve Polo
    Size 12-18 mo
    $9.99 $6.99 30% off with code SHINE
    69% off estimated retail
    Andy & Evan Long Sleeve Henley (view 2)Andy & Evan Long Sleeve Henley (view 1)Price Drop
    View Product: Andy & Evan Long Sleeve Henley

    Andy & Evan

    Long Sleeve Henley
    Size 12-18 mo
    $9.99 $7.99 20% off with code SHINE
    86% off estimated retail
    Gymboree Short Sleeve Button-Down Shirt (view 2)Gymboree Short Sleeve Button-Down Shirt (view 1)Price Drop
    View Product: Gymboree Short Sleeve Button-Down Shirt

    Gymboree

    Short Sleeve Button-Down Shirt
    Size 12-18 mo
    $8.99 $7.19 20% off with code SHINE
    66% off estimated retail
    Baby Gap Short Sleeve Button-Down Shirt (view 2)Baby Gap Short Sleeve Button-Down Shirt (view 1)Price Drop
    View Product: Baby Gap Short Sleeve Button-Down Shirt

    Baby Gap

    Short Sleeve Button-Down Shirt
    Size 12-18 mo
    $8.99 $7.19 20% off with code SHINE
    66% off estimated retail
    Baby Gap Long Sleeve Button-Down Shirt (view 2)Baby Gap Long Sleeve Button-Down Shirt (view 1)Price Drop
    View Product: Baby Gap Long Sleeve Button-Down Shirt

    Baby Gap

    Long Sleeve Button-Down Shirt
    Size 12-18 mo
    $8.99 $7.19 20% off with code SHINE
    66% off estimated retail
    Kidential Short Sleeve T-Shirt (view 2)Kidential Short Sleeve T-Shirt (view 1)Price Drop
    View Product: Kidential Short Sleeve T-Shirt

    Kidential

    Short Sleeve T-Shirt
    Size 12-18 mo
    $7.99 $6.39 20% off with code SHINE
    46% off estimated retail
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