Tim Holtz Cling Mounted Stamps: EntomologyFifteen deeply etched red rubber cling mount rubber stamps that adhere to any clear acrylic block. We highly recommend using them with Tim Holtz Grid-Blocks.Handwritten correspondence measures approximately 3 7/16" x 5 7/16", butterfly (upper right) measures approximately 2" x 1 3/16".Stamps come on a 3-hole punched sheet for easy storage.