I have low pile carpet and initially purchased the “Medium Pile Mat”. This mat was too soft so I upgraded to the “High Pile Mat” which works fine… If you are thinking of purchasing one of these mats regardless of your assumed carpet pile height I would recommend purchasing the high pile offering. This way you will be sure to get the stiffest mat available from this manufacturer. I cannot attest to how the High Pile Mat will work with High Pile Carpet.
We love our new chair mat. It was delivered on time and was already laid flat. Usually a mat might be received rolled and then you have to let it lay out for a day or two to flatten-not the case with this.
I have a very small office in my house. Carpet made moving the chair difficult. Bought the smaller chair mat which took care of the problem. Price is reasonable too.