Wallies Blue Shells Wallpaper Cutouts are prepasted, vinyl coated cutouts that can decorate walls, glass, wood, paper and more. Just wet the back and put them up. They are easy to remove and won’t harm walls. Each package is value packed with 25 individual shells in 3 styles measuring 3-1/2 inches by 3-1/2 inches. The package measures 8-1/4 inches by 7-1/4 inches.