There was a huge discussion (5 pages) on this forum last year regarding wool mats. I am attaching a link below. I bought a 2 ft by 6 ft one from Ecorugpads.com and have been delighted with it. I bought the "natures cushion" as it is the only one offered that is pure 100% wool. It does not smell. I cut mine into a few 18 x 12 sections using my 60mm rotary cutter leaving a large piece that fits on my extra large ironing board when I iron a finished quilt top. My final cost at ecorugpads.com was about $38.00 for a 2x6 ft section.
If you do a search of this forum, there are quite a few discussions on wool mats.
here is the link to the discussion that convinced me.....
Wool pressing mat? Used one?