Personalized Blueberry Muffin Long Sleeve T-Shirt. Buy this funny blueberry muffin Long Sleeve T-Shirt - White gift for any friend who loves to eat muffins. 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