Personalized Engineer Shamrocks Long Sleeve T-Shirt. Engineer text surrounded by an oval of shamrocks is a unique design for the Irish and the Irish at heart on birthdays, holidays 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