These are so convenient because they don't fall out of the book when you carry it around. You can leave it on the page when you start reading again and it's there waiting to mark your place. This is the second batch I've bought. They don't seem to wear out. I suspect I just have them stashed in various books all over my house! The design is really cute! The first time I bought them, the bottom edge was squared off instead of pointed. That doesn't affect the function, just aesthetics.