If you love metal stamping, you will definitely need this wooden metal stamp stand to hold all of your beautiful stamps and keep them organized and handy all in one place. This compact wooden stand can hold up to 40 of your metal stamps. The holes are 7.5mm in diameter, but keep in mind that stamp measurements usually only account for the diameter of the stamped image and not the diameter of the tool. You'll want to account for the diameter of the tool when using this holder.