Silver 3 Inch Ruler Bookmark. Only one left!! This silver bookmark serves 2 purposes, as a bookmark and as a little ruler. The Silver Ruler Bookmark measures 4″ (10.1cm) in total and has ruler lines up to 8cm along one edge and up to 3″ along the other edge. It also has a tassel. As a one off, we offer this Silver 3″ Ruler Bookmark in a heavier gauge at 1.2mm thick. The ruler bookmark makes a lovely gift. Made in the UK by our silversmith and fully hallmarked. Can be engraved on the back. Presented in a gift box.