We got this rug, which fits nicely in the bedroom and means that when I get up (or go to bed) I don't have to walk on a bare, cold floor. Kuma is sitting on the new rug expressing his approval of the design, although he would have also have been happy with the design that had lots of fish on it.
As I've mentioned, we don't have under-floor insulation. As an interim measure, this makes the bedroom a nicer place, especially on cold mornings.