Teenage Mutant Ninja Turtles Hat for Boys 4-6 - TMNT Hat Bundle with TMNT Baseball Cap for Kids Plus Stickers, More | TMNT Baseball Hat for Boys, Kids. This Teenage Mutant Ninja Turtles baseball cap set includes one TMNT hat with adjustable back strap and colorful artwork of everybody's favorite Ninja Turtles Donatello, Leonardo, Michelangelo, and Raphael. This Teenage Mutant Ninja Turtles cap for boys measures 6'' x 5'' x 10'' and with its adjustable back strap, it comfortably fits most young children's heads. Great for any fan of Teenage Mutant Ninja Turtles, this TMNT baseball hat is perfect to give as a gift to your favorite Teenage Mutant Ninja Turtles fan. Officially licensed Teenage Mutant Ninja Turtles hat for all kids, boys and girls alike, also comes with TMNT stickers and a Rex-Man door hanger.