Personalized 100 Days Girl Monster Long Sleeve T-Shirt. Long Sleeve T-Shirt - White with funny cartoon green girl monster wearing glasses with book, pencils and blackboard says 100 DAYS SMARTER. Cute 100 Days of School gift for book worms, book nerds and book lovers. 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