Already have dents that make it hard to roll out of. This is supposed to be for deep pile carpet up to 1" thick. I measured mine as most chair mat calculators tell you to do. 1" includimg the carpet pad. The nubs are described in the answer section as 1/4". They must have change something cause mine is less than 1/8" length but is 1/4" wide. I thought the whole idea for high pile carpet was to have longer nubs. I am on my 4th chairmat in the last 10 years have tried different kinds. Bottom line is that none of the PVC mats will last and not crack or create dents. I will probably be returning it.
The mat is excellent. The other one became cracked due to extensive use over 9 years so it was time to replace it. It is so nice to be able to roll in my chair from my desk to my computer without the chair wheels getting caught up in the cracking of the old mat. Thanks.
Works just well enough on mild thick carpet but cant imagine using on anything considered plush. Small divots form if sitting in one spot but easy enough to roll out.
Carpet mat seems thick enough to support me and my office chair on thick pile carpet but it continuously wants to slide sideways until it starts to curl against table leg. Needs longer cleats to get a better bite into carpet.