primitive vintage flour sack fabric, lot old cotton feed sacks some w/ stitching

Lot of twelve genuine old cotton flour sacks, about half of them still sewn up with the original chain stitching. The sewn sack size is about 18" x 36", 36" x 36" fabric size opened flat.

These are not identical, though the fabrics are similar in weight and color. All of them have spots or age related discoloration, and some have a few rips or holes as well.