This is a clear photopolymer stamp set measuring 4 x 8 inches. Our clear stamps are made in the USA from the highest quality photopolymer.The dies are US-made steel dies and are compatible with most tabletop die cut machines. Some of the more detailed dies require extra care to achieve the best results. Additional shims may be necessary and some machines handle the detail level better than others. If you are using a Cuttlebug with very detailed dies, we recommend using a metal adapter plate for best results. The metal plate also works well with other machines and the very detailed dies.