"The thickness of the bookmarks is very good; not too flimsy, but not too thick. They look great when colored with markers! We had a few that did not have the holes punched all the way through and had to be punched. We also had to be careful tying the ribbons, because the holes would rip out if the ribbon is pulled too much. We lost about 8 bookmarks out of the 12 dozen we ordered, to tearing problems."