Please be aware that the pdf viewer in Google Chrome web browser does not render the pdf true to size. If you’re going to print this out to determine the block you need for a stamp, use another browser. I’ve tested it in Firefox and Safari and they work fine. I don’t know about Internet Explorer. When you print it out, if the dimensions of the image don’t match the written measurements, you need to try it with a different browser.
Use this link to download the Clear Block Template.