Hey Dabbler, I have a set of those rulers but haven't used them yet. Funny, one of the women I work with came in with three bookmarks using that diamond ruler and I said (and I quote) "OHMYGODIWANTONE"!! So I looked online, and they are available (for something like $22). So I whined and didn't bite. Then my friend who is the world's best bargain hunter went to an estate sale around the corner from her house and found me the complete set with the 2 sized rulers and instructions for..... wait for it..... $.50!!! Woohhooo. Now to buckle down and make some book marks for christmas. Although many of my friends now read digitally, there are still a few that enjoy a good solid book to read. I'm one because A. I work in a library, and B. I'm too cheap to buy them for my 2nd gen Kindle!