I have 8x11, 5x8, a runner and three doorway 2x4 Nourison Caspian wool carpets with these pads under each one. The non-skip backing is great,especially on the smaller doorway and runner carpets. The are thick and make the Nourison carpets even more lush to walk on. I liked the first one I bought 7 more for all the carets in my home, so I'm already a repeat buyer of this product and DO RECOMMEND!