Personalized 60th Birthday Funny Sixty Happens Long Sleeve T-Shirt. Funny 60th birthday Long Sleeve T-Shirt - White party idea with sixty happens quote for someone turning 60 years old. 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