Personalized Math Jigsaw Long Sleeve T-Shirt. Math spelled with interconnecting jigsaw puzzle pieces is a fun gift design for birthdays, holidays, graduation and back to school. 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