The sandpaper was cut from large sheets, so it doesn't have exact dimensions, most parts won't fit in the rubber sander. It took me an hour to sort through all the grits. They are simply thrown together at random. For smaller projects this would be fine, but for larger products it's better to get the exact grit you want in a larger set of sheets. Also, most of the time I have to throw out a good piece because it just starts falling apart. It's good that I have stock, but I don't plan on ordering again.