Personalized PreSchool Light Rocks Long Sleeve T-Shirt. PreSchool rocks text with three happy rocks holding PreSchool flags is a funny design for back to school, birthdays and holidays. 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