This is a nice sized chair mat for a home office. Clear plastic and durable so far. Does a good job of protecting the carpet and has sharp tips on the down side to keep it in place.
Great for "temporary office" at dining room table. Not quite thick/hard enough for rolling office chair and my weight; wheels tend to sink in part way. Otherwise perfect for the current purpose.
This mat works pretty well. It allows my chair to move more smoothly over the carpet. However the plastic is soft enough that it will temporarily deform and create little "ruts" - and I'm not a big person (165 lbs.). These requiring a bit of a shove to slide out of.