Catslife Press Artist Trading Card Back UNMOUNTED Outta This World. ATC stamps by Catslife Press. Personalize the backs your ATCs with this stamp. This stamp is unmounted and measures 3 1/4 " X 2 1/4". Great for stamping on your ATCs for swaps. Just stamp and fill in the rest. You can mount the stamp with EZ Mount Static Cling or with Tack N Peel for use on acrylic blocks, or mount them yourself onto a piece of wood. Tack ’n Peel allows for easy aligning of your unmounted stamps on acrylic blocks. Simply rinsing the surface with water and air-drying can easily preserve the adhesive layer – stickiness will restore over and over again so you only need to purchase one for all of your unmounted stamps. Economical and a super space saver. Find it listed under this same category.