Are measurements for Mystic Mounts the size of the mount or the size of the stamp?

The measurements listed for Mystic Mounts are the size of the mount. For example, SKU MM501, is a 45 millimeter (width) by 30 millimeter (height) mount. This size mount is ideal for stamps that are 40 millimeters by 25 millimeters. We also offer “strip” mounts. Order those based on the height of the stamp you need a mount for, then cut the strip to the width you need. Mount sizes for most stamps are listed on the stamp’s page.