Little and big kids will love this Mario swim trunk and rash guard shirt set! Sizing is little boys' size 4/5 (shown in dropdown menu as 4-5 years) and 6/7 (shown as 6-7 years) and big boys' size 8 (shown as 8 years), 10/12 (shown as 10-12 years), and 14/16 (shown as 14 years). Swimsuit also has UV 50 to help prevent sunburn. Swim shorts have an elastic waist with an inside adjustable drawstring and mesh lining on the inside of the swim trunks. The material of the swimsuit is 100% polyester. The short sleeve top is 92% polyester and 8% spandex. The swim bottoms have front and back allover sublimation print. The top is red with navy sleeves. The bottom swim shorts have cool graphics with all the favorite Mario characters. The characters on the sublimated trunks include Luigi, Toad, Princess Peach, Bowser, Donkey Kong, Yoshi, Turtle, and Mushroom. The background has graphics straight from the game! The top has an applied graphic! Boys will be ready for summer vacation, spring break and everyday swimming- at the pool, lake, beach, ocean, or swimming lessons.