This is a replacement for a similar mat we had for a few years. It is not terribly rugged but works for our purposes. Not quite sure how to remove the tabs on the edge used to hang it in the store!!
I measured my carpet as directed and chose the low-pile based on that. This mat is too soft for my carpet and the wheels on my desk chair sink in creating divots that it's hard to wheel out of. I stopped using it after a week and it's now sitting on my cellar's cement floor.