They are thinner than I expected and when they say "large" and "small" I had to laugh because they are very close in size. My cats use them but I should have been more wise and purchased cat scratchers that were "rockers" or made to look like they were a wedge because they are much much easier for my three cats to use and therefore they are more likely to use consistently. They aren't made very well the inside isn't woven too tightly when you order them if you do then you will know what I mean so they won't last as long (they aren't as dense). The wedge type ones have a hole in the sides where you can put toys in them and my cats like those so they can play in them. My bad in ordering this. It cost $8.95 to send back not worth it when they are $7.99. a learning lesson.