The chair mat is a perfect size for my needs. However it is not thick enough as it forms depressions from the chair. Wouldn't recommend unless you weigh as much as a child!
My mat was delivered as promised - just not in the condition I was expecting. It came dust-covered - no not with a dust cover but rather covered in dust - some of it darker than you'd expect. (Not a popular item in the warehouse I take it.) Obviously it had been left in the delivery truck on a cold night in a semi-compromising position - so I had to wait a couple of days for the curve to it to "melt" out. After some Windex and a few pounds of old text books it was as good as new and works just great.
This particular mat was delivered in a timely manner on a cold winter day in a heavy cardboard "tube" which turned out to be a big mistake. The plastic material had "taken on a set" and wouldn't uncoil (unroll) and warming up in the house had no effect on the stubborn plastic which reminded me of some kind of cheap recycled hard pop bottle junk material. Why the mat is not kept in a flat storage position is beyond reason because it had become unusable in the coiled position and nothing on "God's green earth" was going to change that so I returned it to the local Glenview Ill store. The management was very understanding and I received a full refund. I was told that it was a "closeout" and it wouldn't do any good to reorder it.