The Whale of a Tale Wall Decals contains 4 10 inch x 18 inch sheets of stickers. They combine to create an anchor and life preserver. The assembled anchor measures 15.5 inches x 18.75 inches. The assembled life preserver is 16.725 inches x 16.725 inches. They have self-stick adhesive that won't harm walls. The decals are removable and reusable. Just peel and stick.