I have presented the button and ribbon bookmark and the bookmark with elastic before.
The button bookmarks is made with elastic and button and ribbon ;-)
Links:
Button Bookmarks (Basic Sewing Skills Ribbon Bookmark)
via: 23 Easy To Make and Extremely Creative Button Crafts Tutorials – 7.) DIY Bookmarks from Buttons
Here at unikatissima:
Button and Ribbon Bookmark
Bookmarks with Elastic