After a brush scrubbing, and some steaming, but absent any felt strips, I was looking for a quick and dirty way to absorb the oversize of 7 1/2" Long Oval of my new, free Beaver Cattleman and happened across some plastic foam packing sheets in two thicknesses. The pink mics at 2.5mm and the white is 1.5mm; your attic finds may vary. I cut one length of the heavier pink into an inch-plus wide, 24" long strip, folded down the leather sweat, tucked it in and presto, down-sized to 7 3/8! Below, I pulled one side out a bit for photographic purposes, but you get the idea. Now, i can wear this a bit and decide if I want to invest in professional cleaning and resize. It brushed out fairly well, so the surface grit and dust is gone.