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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.
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![Under Armour Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/603050910/complimentary.jpg)
![Under Armour Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/603050865/complimentary.jpg)
Under Armour
Short Sleeve T-Shirt
Size Small youth
$12.99 $7.14 45% off with code GOBIG
51% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/602658035/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/602657959/complimentary.jpg)
Under Armour
Active T-Shirt
Size Medium youth
$18.99 $10.44 45% off with code GOBIG
53% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/602470728/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/602470616/complimentary.jpg)
Under Armour
Active T-Shirt
Size Medium youth
$16.99 $9.34 45% off with code GOBIG
58% off estimated retail![Under Armour Pullover Hoodie (view 2)](https://cf-assets-thredup.thredup.com/assets/602088771/complimentary.jpg)
![Under Armour Pullover Hoodie (view 1)](https://cf-assets-thredup.thredup.com/assets/602088743/complimentary.jpg)
Under Armour
Pullover Hoodie
Size X-Small youth
$25.99 $14.29 45% off with code GOBIG
61% off estimated retail![Polo by Ralph Lauren Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601827731/complimentary.jpg)
![Polo by Ralph Lauren Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601827639/complimentary.jpg)
Polo by Ralph Lauren
Long Sleeve T-Shirt
Size 6
$13.99 $7.69 45% off with code GOBIG
48% off estimated retail![Johnnie-O Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601954722/complimentary.jpg)
![Johnnie-O Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601954666/complimentary.jpg)
Johnnie-O
Long Sleeve Button-Down Shirt
Size 10
$20.99 $11.54 45% off with code GOBIG
75% off estimated retail![Under Armour Pullover Hoodie (view 2)](https://cf-assets-thredup.thredup.com/assets/602805392/complimentary.jpg)
![Under Armour Pullover Hoodie (view 1)](https://cf-assets-thredup.thredup.com/assets/602805238/complimentary.jpg)
Under Armour
Pullover Hoodie
Size X-Large youth
$24.99 $13.74 45% off with code GOBIG
54% off estimated retail![Under Armour Zip Up Hoodie (view 2)](https://cf-assets-thredup.thredup.com/assets/602001869/complimentary.jpg)
![Under Armour Zip Up Hoodie (view 1)](https://cf-assets-thredup.thredup.com/assets/602001782/complimentary.jpg)
Under Armour
Zip Up Hoodie
Size Medium youth
$21.99 $12.09 45% off with code GOBIG
60% off estimated retail![Vineyard Vines Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/602253629/complimentary.jpg)
![Vineyard Vines Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/602253476/complimentary.jpg)
Vineyard Vines
Long Sleeve T-Shirt
Size 18
$15.99 $8.79 45% off with code GOBIG
40% off estimated retail![Ralph Lauren Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601805657/complimentary.jpg)
![Ralph Lauren Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601805537/complimentary.jpg)
Ralph Lauren
Long Sleeve Button-Down Shirt
Size 6
$17.99 $9.89 45% off with code GOBIG
71% off estimated retail![Ralph Lauren Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601801306/complimentary.jpg)
![Ralph Lauren Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601801209/complimentary.jpg)
Ralph Lauren
Long Sleeve Button-Down Shirt
Size 6
$14.99 $8.24 45% off with code GOBIG
76% off estimated retail![Calvin Klein Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/602135762/complimentary.jpg)
![Calvin Klein Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/602135288/complimentary.jpg)
Calvin Klein
Long Sleeve Button-Down Shirt
Size 16
$13.99 $7.69 45% off with code GOBIG
66% off estimated retail![Sonoma Goods for Life Pullover Sweater (view 2)](https://cf-assets-thredup.thredup.com/assets/601819787/complimentary.jpg)
![Sonoma Goods for Life Pullover Sweater (view 1)](https://cf-assets-thredup.thredup.com/assets/601819723/complimentary.jpg)
Sonoma Goods for Life
Pullover Sweater
Size 5
$12.99 $7.14 45% off with code GOBIG
61% off estimated retail![Rossignol Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601889312/complimentary.jpg)
![Rossignol Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601889276/complimentary.jpg)
Rossignol
Short Sleeve T-Shirt
Size X-Small youth
$25.99 $14.29 45% off with code GOBIG
42% off estimated retail![Smart Blanks Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/602107036/complimentary.jpg)
![Smart Blanks Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/602106951/complimentary.jpg)
Smart Blanks
Short Sleeve T-Shirt
Size Medium youth
$10.99 $6.04 45% off with code GOBIG
50% off estimated retail![Gap Kids Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601761141/complimentary.jpg)
![Gap Kids Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601761102/complimentary.jpg)
Gap Kids
Short Sleeve T-Shirt
Size Small kids
$9.99 $5.49 45% off with code GOBIG
52% off estimated retail![OshKosh B'gosh Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/552735277/complimentary.jpg)
![OshKosh B'gosh Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/552735272/complimentary.jpg)
OshKosh B'gosh
Short Sleeve Button-Down Shirt
Size 5T
$9.99 $5.49 45% off with code GOBIG
63% off estimated retail![Gap Kids Short Sleeve Polo (view 2)](https://cf-assets-thredup.thredup.com/assets/602023110/complimentary.jpg)
![Gap Kids Short Sleeve Polo (view 1)](https://cf-assets-thredup.thredup.com/assets/602022997/complimentary.jpg)
Gap Kids
Short Sleeve Polo
Size Large kids
$10.99 $6.04 45% off with code GOBIG
47% off estimated retail![Peek... Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601934480/complimentary.jpg)
![Peek... Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601934349/complimentary.jpg)
Peek...
Long Sleeve Button-Down Shirt
Size 12-18 mo
$13.99 $7.69 45% off with code GOBIG
68% off estimated retail![Galaxy by Harvic Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/603125491/complimentary.jpg)
![Galaxy by Harvic Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/603125476/complimentary.jpg)
Galaxy by Harvic
Short Sleeve T-Shirt
Size 12
$27.99 $15.39 45% off with code GOBIG
63% off estimated retail![Under Armour Pullover Hoodie (view 2)](https://cf-assets-thredup.thredup.com/assets/603149106/complimentary.jpg)
![Under Armour Pullover Hoodie (view 1)](https://cf-assets-thredup.thredup.com/assets/603149044/complimentary.jpg)
Under Armour
Pullover Hoodie
Size Medium youth
$21.99 $12.09 45% off with code GOBIG
60% off estimated retail![Hanna Andersson Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/602526434/complimentary.jpg)
![Hanna Andersson Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/602526301/complimentary.jpg)
Hanna Andersson
Long Sleeve T-Shirt
Size 3-6 mo
$9.99 $5.49 45% off with code GOBIG
41% off estimated retail![Airwalk Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/584953557/complimentary.jpg)
![Airwalk Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/584951771/complimentary.jpg)
Airwalk
Long Sleeve Button-Down Shirt
Size 10
$12.99 $7.14 45% off with code GOBIG
40% off estimated retail![Carter's Watch the Wear Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/603246947/complimentary.jpg)
![Carter's Watch the Wear Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/603246946/complimentary.jpg)
Carter's Watch the Wear
Long Sleeve T-Shirt
Size 6-9 mo
$5.99 $3.29 45% off with code GOBIG
14% off estimated retail![Rothschild One Piece Snowsuit (view 2)](https://cf-assets-thredup.thredup.com/assets/602167064/complimentary.jpg)
![Rothschild One Piece Snowsuit (view 1)](https://cf-assets-thredup.thredup.com/assets/602167014/complimentary.jpg)
Rothschild
One Piece Snowsuit
Size 3-6 mo
$25.99 $14.29 45% off with code GOBIG
80% off estimated retail![Under Armour Pullover Hoodie (view 2)](https://cf-assets-thredup.thredup.com/assets/601623121/complimentary.jpg)
![Under Armour Pullover Hoodie (view 1)](https://cf-assets-thredup.thredup.com/assets/601622880/complimentary.jpg)
Under Armour
Pullover Hoodie
Size Small youth
$19.99 $10.99 45% off with code GOBIG
63% off estimated retail![Assorted Brands Pullover Sweater (view 2)](https://cf-assets-thredup.thredup.com/assets/603147112/complimentary.jpg)
![Assorted Brands Pullover Sweater (view 1)](https://cf-assets-thredup.thredup.com/assets/603147080/complimentary.jpg)
Assorted Brands
Pullover Sweater
Size Small youth
$21.99 $12.09 45% off with code GOBIG
60% off estimated retail![Crewcuts Outlet Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/590201492/complimentary.jpg)
![Crewcuts Outlet Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/590201434/complimentary.jpg)
Crewcuts Outlet
Long Sleeve Button-Down Shirt
Size 12
$14.99 $8.24 45% off with code GOBIG
54% off estimated retail![Samgami Baby Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601339309/complimentary.jpg)
![Samgami Baby Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601339237/complimentary.jpg)
Samgami Baby
Long Sleeve Button-Down Shirt
Size 120 cm
$14.99 $8.24 45% off with code GOBIG
54% off estimated retail![Polo by Ralph Lauren Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601343809/complimentary.jpg)
![Polo by Ralph Lauren Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601343720/complimentary.jpg)
Polo by Ralph Lauren
Long Sleeve Button-Down Shirt
Size 10
$16.99 $9.34 45% off with code GOBIG
67% off estimated retail![O'Neill Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/602344183/complimentary.jpg)
![O'Neill Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/602343813/complimentary.jpg)
O'Neill
Long Sleeve Button-Down Shirt
Size Small youth
$15.99 $8.79 45% off with code GOBIG
63% off estimated retail![Gap Kids Outlet Pullover Sweater (view 2)](https://cf-assets-thredup.thredup.com/assets/601963787/complimentary.jpg)
![Gap Kids Outlet Pullover Sweater (view 1)](https://cf-assets-thredup.thredup.com/assets/601963647/complimentary.jpg)
Gap Kids Outlet
Pullover Sweater
Size 120 cm
$17.99 $9.89 45% off with code GOBIG
47% off estimated retail![Ralph Lauren Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601950515/complimentary.jpg)
![Ralph Lauren Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601950265/complimentary.jpg)
Ralph Lauren
Long Sleeve Button-Down Shirt
Size 6
$16.99 $9.34 45% off with code GOBIG
73% off estimated retail![Hannah Kate Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601947653/complimentary.jpg)
![Hannah Kate Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601947489/complimentary.jpg)
Hannah Kate
Long Sleeve Button-Down Shirt
Size 6
$17.99 $9.89 45% off with code GOBIG
72% off estimated retail![Under Armour Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/560748377/complimentary.jpg)
![Under Armour Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/560748366/complimentary.jpg)
Under Armour
Long Sleeve T-Shirt
Size Small youth
$14.99 $8.24 45% off with code GOBIG
44% off estimated retail![Ralph Lauren Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/602031909/complimentary.jpg)
![Ralph Lauren Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/602031832/complimentary.jpg)
Ralph Lauren
Long Sleeve Button-Down Shirt
Size 6
$14.99 $8.24 45% off with code GOBIG
76% off estimated retail![Danskin Now Pullover Hoodie (view 2)](https://cf-assets-thredup.thredup.com/assets/603173421/complimentary.jpg)
![Danskin Now Pullover Hoodie (view 1)](https://cf-assets-thredup.thredup.com/assets/603173273/complimentary.jpg)
Danskin Now
Pullover Hoodie
Size Medium kids
$12.99 $7.14 45% off with code GOBIG
40% off estimated retail![James Perse Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/602965286/complimentary.jpg)
![James Perse Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/602965012/complimentary.jpg)
James Perse
Long Sleeve Button-Down Shirt
Size 3
$11.99 $6.59 45% off with code GOBIG
78% off estimated retail![Urban Pipeline Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/603002477/complimentary.jpg)
![Urban Pipeline Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/603002431/complimentary.jpg)
Urban Pipeline
Long Sleeve Button-Down Shirt
Size Small kids
$8.99 $4.94 45% off with code GOBIG
66% off estimated retail![Rachel Ashwell TJX Short Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601532392/complimentary.jpg)
![Rachel Ashwell TJX Short Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601532325/complimentary.jpg)
Rachel Ashwell TJX
Short Sleeve Button-Down Shirt
Size Small kids
$11.99 $6.59 45% off with code GOBIG
55% off estimated retail![Dockers Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/602827512/complimentary.jpg)
![Dockers Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/602827169/complimentary.jpg)
Dockers
Long Sleeve Button-Down Shirt
Size 6
$15.99 $8.79 45% off with code GOBIG
63% off estimated retail![Crewcuts Outlet Long Sleeve Turtleneck (view 2)](https://cf-assets-thredup.thredup.com/assets/602526326/complimentary.jpg)
![Crewcuts Outlet Long Sleeve Turtleneck (view 1)](https://cf-assets-thredup.thredup.com/assets/602526216/complimentary.jpg)
Crewcuts Outlet
Long Sleeve Turtleneck
Size 12
$12.99 $7.14 45% off with code GOBIG
48% off estimated retail![Under Armour Short Sleeve Polo (view 2)](https://cf-assets-thredup.thredup.com/assets/553862947/complimentary.jpg)
![Under Armour Short Sleeve Polo (view 1)](https://cf-assets-thredup.thredup.com/assets/553862799/complimentary.jpg)
Under Armour
Short Sleeve Polo
Size Small youth
$22.99 $12.64 45% off with code GOBIG
43% off estimated retail![Appaman Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601964147/complimentary.jpg)
![Appaman Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601964009/complimentary.jpg)
Appaman
Long Sleeve Button-Down Shirt
Size 4T
$14.99 $8.24 45% off with code GOBIG
66% off estimated retail![Crewcuts Long Sleeve Button-Down Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/597799535/complimentary.jpg)
![Crewcuts Long Sleeve Button-Down Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/597799440/complimentary.jpg)
Crewcuts
Long Sleeve Button-Down Shirt
Size 8
$9.99 $5.49 45% off with code GOBIG
84% off estimated retail![Littlest Prince Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601097287/complimentary.jpg)
![Littlest Prince Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601097251/complimentary.jpg)
Littlest Prince
Long Sleeve T-Shirt
Size 12 mo
$6.99 $3.84 45% off with code GOBIG
61% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601457316/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601457275/complimentary.jpg)
Under Armour
Active T-Shirt
Size Small youth
$19.99 $10.99 45% off with code GOBIG
51% off estimated retail![Under Armour Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/601330846/complimentary.jpg)
![Under Armour Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/601330813/complimentary.jpg)
Under Armour
Short Sleeve T-Shirt
Size X-Small youth
$11.99 $6.59 45% off with code GOBIG
55% off estimated retail