Personalized Class of 2021 Rocks Light Long Sleeve T-Shirt. Class of 2021 rocks text with three happy dancing rocks holding class of 2021 flags is a humorous gift design for school students excited about graduating in 2021. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL