Very thin carpet in business office. Took old mat in and my wife went with Staples rep to get a replacement. NOT same size - at least 6" shorter in both directions and too thin. Rolling around is an effort.
This mat is flexible enough to be moved into place easily and is easy on the feet. On the other hand it's firm enough to be a good surface under my chair even over very plush carpet. (Carpet with double pads underneath.)
Advertized for high pile carpet but totally unsuitable for my home office that has 1/2" pile carpet plus underpad. The chair wheels create craters in the mat that the chair persists in rolling back into when you try to move the chair a small distance. I purchased another pad from another store that is much heavier but still craters under the wheels but to a lesser degree. I use a standard 5 wheel office chair and I weigh in at 170 lbs.