This mat is much smaller than the one we had before. It is much too soft and gets pockets where the chair rolls over it. The edges also curl. Wish I had purchased another one like I had before. It was harder and larger. This one was a waste of money for me. I would only recommend using this on a concrete or no pile carpet.
Didn't like the softness of the plastic. Used on rug wheels from chair would sink in a bit leaving an indentation. Also not very easy for chair to slide over possibly because lack of hardness in plastic. Maybe best used on industrial type rug or carpet.