The Hide & Seek Wall Decals contains 4 - 10 inch x 18 inch sheets of various sized stickers. Decals feature animal faces peeking out from background and rounded square shapes. They range in size from 2.5 inches x 2.25 inches to 6.5 inches x 6.25 inches. They have self-stick adhesive that won't harm walls. The decals are removable and reusable. Just peel and stick.