Personalized 18th Wedding Anniversary Cheers to 18 Years T-Shirt. Celebrate your anniversary in style with our18th Wedding Anniversary Cheers to 18 Years apparel and gifts. Show your love and commitment to each other with these beautiful and unique items. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.