I would not recommend this chair mat at all. We replaced it with a higher quality from a different store within a week. You get what you pay for is so true!
It was so heavy and so difficult to carry out of the store I thought for sure it would stay in place once I got it to the office. However I have to reposition this mat every single day (sometimes twice a day) because it's constantly moving and creeping up one side of my desk. It's very annoying to say the least.
I've had three of these mats over the years and all three lasted 12-16 months before severely cracking. It may be my fault as I'm 200# and use this mat over berber carpeting with a 5-point carpet caster chair. The vinyl material is .110mil which isn't thick enough to support daily use. Staples has been great in replacing the first two but this time they said the warranty was through the manufacturer unless I wanted to upgrade to a different model. Being that was my intent in the first place I gladly paid the additional $35 for the .170mil thick mat which will be delivered to my home free of charge. My recommendation: determine what you need from the descriptions then buy the next thicker model. Staples is one of the best stores I deal with and their motto "We Make It Easy" has always proven to be true. We need to remember they don't manufacture these mats but they do stand behind what they sell!
I wish I had realized how lightweight this carpet floor mat is. It tends to slide easily and is never in the spot I placed it. It looks nice but is not the quality of the the mat I had before this also purchased at Staples.