The problem is a standard desk chair will kill these floors.
I used to use an office-store standard sheet of thick plastic to protect my floor, but it's too small. I'm constantly rolling off of it.
Now I'm trying some foam rubber floor times I picked up at home depot, but the chair slowly flattens them, which makes the one that I sit on ever so slowly too big to fit.
Anyone use any kind of large floor protector? What works well?
--- Edit
Wow, I just noticed somebody advised rubbered wheels and was heavily downvoted, I wonder why? I used that in the past and it was good solution to prevent floor damage.
This is a fairly big mat. 6 ft x 6 ft
It's just another option.