I have a medium carpet length. I consider it standard for a living room length. The wheels of the chair stretch out the matt and I sink it making it hard to push away from the desk. I am not happy with it but I guess you get what you pay for. It was the cheapest of the choices but it did say for carpet length I have.
I'm not that large of a person but after just 3 or 4 minutes depressions form under each of the chairs rollers that are difficult to roll out of. The price was attractive but turns out to have been a waste of money.
Not good fell in dips in carpet I would not have recommended if you have ruts in carpet. That’s was the reason to buy. Product or strong enough..... I don’t recommend.