Personalized Chemistry Small Heart Long Sleeve T-Shirt. Chemistry text with a heart dotting the i in chemistry is a fun gift design for teachers, students and chemists at back to school, birthdays, holidays and graduation 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