I put my vote for the green Olfa mat! I have, um, 1 big one that lives on my coffee table, 2 mediums - one lives on my sewing table, partially under my machine - it's actually the first one I ever bought, about 15 yrs old & cracked on one corner, but I can trim stuff on the other end ;-) - the other medium lives to travel to class with me, in my rolly cart, one small one, for paper piece trimming & one of the ones that rotate around - currently also on the coffee table! LOL (Also have a rather large collection of rotary cutters...have bought a couple on sale as they were cheaper than buying a blade alone!)
sue :D