I have 3;
1-12"x18" quilter's cut-n-press, this one I take to classes,
1-18"x24" this one has deep gouges,
1-24"x36" the newest one

there is a tool you can buy on line,none of the stores seem to carry it, to keep your mats in good condition.
It's called a Mat Smoother, by Tri-sharp. I use it after regular cutting and it keeps my mat smooth!
http://www.fabric.com/ProductDetail....3-f7d6c071d7a1

12 x 18 ironing/cutting board
16 x 24
6 x 6 spinner

4 here including a rotating one. Use them all.

2 affixed to my cutting board..one 23 X 70 and one 23X35
1 23X35 that I carry around and one 23X6 (I think) in my travel bag and one 6X6 that I never use!

Um just one...and it's over 20 years old. It seems fine-am I missing something?

i have 2, 24x36 and 6x12

I have four plus my new fip one, press on one side and cut on the other. Just bought a new huge one, self healing, as my DH and I destroyed one cutting coroplast boards on it. Also picked up a rotary one which I think I'll really like. The baby one, like 6 x 8 I picked up at the quilting expo and it's great for those little jobs.

Lots,

2 - 36x36
2 - 6x18
3 - 6x12 I think
1 - 8x8 I think this one was a freebie from a show
1 - 36x48
At one point I have used all of these.

4 looks like I dont have enough