I've had this office chair mat for awhile now and works well. Definitely wouldn't want to go a smaller in size. One thing to note is the mat is not packaged in anything so when it arrived it was dirty (nothing a quick wipe down won't take care just a little annoying).
While this mat comes in a rather long box and is rolled into an eight inch diameter tube it is now flat. Because of the time of year it had gotten pretty cold during transit and was a little challenging to unroll. Within a couple of hours it was flat. My dying chair rolls easily now! Part of me wishes I could put them end to end in the whole room!
Material was to light weight and not happy with it all. Chair won't roll well on the new mat as it is to SOFT. Too Mat was not large enough much smaller than the old one I had.