Personalized 6th Anniversary Tree T-Shirt. So cute, this 6th Anniversary heart tree design to celebrate 6 Years of Love comes on a 6 Year Wedding Anniversary T-Shirt - Green gift you can personalize. Everyone loves our Custom T-Shirts! 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.