Personalized Teacher Three Shamrocks Long Sleeve T-Shirt. Teacher text with three shamrocks is a unique gift idea for your favorite teacher at birthdays, holidays, back to school and St. Patrick's Day. 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