This is very stiff. So it does not stay flat on the floor. Chair rolls too easily on it. Had I seen it before buying I would never have bought it (ordered online without seeing).
Someone had rolled these pads up and taped them using clear packing tape. It was a good idea to carry them easily but it took about 30 minutes with a rag and goo-gone to remove all of the tape residue.
Many sizes are available but this one covers the entire area. Our desk chair with rollers moves freely now to all areas used at our 60 X 30 desk with return. Brand new hardwood floors and no worry now!