Personalized 25th Birthday Party 25 Year Old Long Sleeve T-Shirt. Celebrate a 25 year birthday with this music themed funny 25th birthday party design. 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