Honestly this mat is pretty terrible. The problem is that the material is too soft so after a few moments your chair’s casters will sink into divots that you’ll have to roll out of when you try to move (yes I’m a fairly normal size person; 6’1” 220)
I weigh 155 and have a standard size chair. The mat is quite thin and the wheels of my chair leave pretty deep impressions and doesn’t easily move when I need it to. I would not buy again.