NWT--one size fits most (OSFM) This set includes a pom-pom beanie with a blue/green multi color and dinosaur design. It's made from 100% acrylic material and has stretch for a comfortable fit that keeps little ones warm during winter. Get your little boy ready for the winter season with this Jurassic Park knit hat that is perfect for any occasion, whether it's for activewear or casual wear. The set comes in one size, making it a great gift for any young boy. The classic dinosaur theme and Jurassic Park branding make it a must-have for any young boy who loves dinosaurs. This set is perfect for fall, winter, and spring seasons.