ClearDesign blocks are especially made for use with Hero Arts ClearDesign stamps. The highest quality block available, each is buffed and polished by hand to give the smoothest and most exact stamping surface available. This clear acrylic block is sized for use with the large letter that comes with each ClearDesign Set. The block has gently rounded edges for stamping comfort and is crystal clear for precision stamping. Block measures 3" x 4.5" ClearDesign Block - Large Letter - Hero Arts