Size and appearance of the mat are fine however the mat developed a series of cracks after only 6 weeks of daily usage by an average weight (150lb) male in a standard wheeled office chair. Way too flimsy to recommend purchase of this item.
Material is not beefy enough so the chair sinks in and then you have to stand up to move the chair. Material should be harder plastic. or I guess I could be lighter. Sorry now that I bought it. But it's too late. I own it.