Room size cotton rag rug, 1940s or 50s vintage. This is a really nice big one, measures 126" wide x 200" long. (10 1/2 feet x 16 1/2 feet long!)
The joins at the woven widths are a little loose, and could use re-stitching. And the rug needs cleaning, although it's odor-free, from a non-smoking home. Overall it looks very good, few wear spots or other condition problems, even after many years of use.