These are thin enough I am not worried about them damaging the spines of the book or the binding. They designs are beautiful as wellReally gorgeous bookmarks, and great gifts for the book-lovers in your life. Or for yourself, if you like some nature-inspired bookmarks. :)As someone who regularly just shoves a receipt in my books, I am relieved to actually have some good bookmarks. These are good quality and attractive. I'm really happy with them. I can always find my page quickly.These bookmarks are very pretty. They look so nice. They would do very well as a gift for someone. I am very pleased with the quality. They came in a nice gift box. It is nice to get the variety. The presentation is good. It is a nice gift for someone you don't know what to get for. I would recommend them.