I had a nice surprise last Christmas, big box I couldn't figure out (I usually guess everything I get). Hubby decided I needed a mat. It's 3'x5' and fits perfectly on the counter between dining room and kitchen. It is not an Ofla, and may not be self-healing, but I guess I could get another one if it gets too "rutted".
I use my 24" x 6" ruler most often. I find the others are often too slim. I've ran into trouble not realizing some rulers have 1/2" built in on the side. (usually highlighted) So, I think I'm looking at 2" and really it's 2.5" The same goes for squaring up pieces. Supposed to be 10" and end up with 10.5"