Boys' Costumes

Big adventures start with a great costume. Shop boys' Halloween costumes featuring superheroes, video game favorites, dinosaurs, aliens and spooky characters at Mr. Boo Costumes. From Spider-Man and Minecraft to Sonic and inflatable T-Rex styles, find inspiration for trick-or-treating, costume parties and imaginative dress-up.

Explore toddler and kids' options, funny costumes and frightful looks to match their personality. Before choosing, check each product's size guide and included accessories to find the right outfit for your little monster.