Thick foam with deeply etched rubber. There are 4 rubber stamps in this pack that can cling mount to any clear acrylic block

Sheet size: 7ins x 8.5ins (17.5cms x 21.25cms) approx.

They are mounted on a cover sheet, which acts as a place to store the stamps when not in use, and the cover sheet is designed to fit in the unmounted stamp binder or case.