Quilting weight cotton fabric - this is 68" wide (like a double width of old fabric). It's 1 1/2 yards, does have some faint discoloration which I did not try to remove.
I'm not sure how old this is. I did get this in an estate lot with no new fabrics, but I think this print looks mid-century, and I've never found mid-century cottons for regular household use this wide before. Selvage is unmarked, so I'm doubting it's a reproduction, however. Perhaps made for bedding? It's a regular sort of cotton, not sheeting.