Personalized 40th Birthday Party Long Sleeve T-Shirt. 40th Birthday Party Long Sleeve T-Shirt - Pink has fun green logo with gift boxes design and slogan that says Celebrating My 40th Birthday. 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