Die Cuts And More dies are high-quality steel and are compatible with most die cutting machine . *For more intricate dies, we recommend using theSizzix Precision Base Plate ora metal shim. This die is not compatible with your regular bigshot machine. U need a bigger size machine like Big shot plust for this die. The assembled size of the envelope is 3.75″ X 7.5″ approx.Set of 1 die. The die measures 8.5″ X 10.75″ Approx.