Hello.
Flour sack Towels are 100% cotton; usually a rough texture. Their current size ranges from 30 x 29 inches to 30 x 34 inches approximate. As Pat stated, they are excellent for drying dishes. Also, because of their size, I can usuaully cut them in half lengthwise and get two towels (plus I have to hem the cut edges). It works best for me because I make a towel topper and this flour sack towel has to be gathered to fit the topper.
Flour sacks are originally from the old flour sacks and feed sacks. Back in the 30s, women started utilizing the empty sacks and made clothing from them, dish towels, pillowcases, clothespin bags, etc. Times were bad with the depression. "Sack dresses" originated during this time period. They came back in the 60s again too. The women begged the manufacturers of chicken feed, horse feed, flour and sugar to please make the sacks softer to the touch and try to add some color to them. Hence, the feedsack quilts of the 30s originated with beautiful colorful prints. Win/win situation. Chickens ate well and you had a purty new dress.
The sizing on these towels are irregular today because they are still holding true to what a grain sack was back when. The grain sack was sewn on one side and bottom and then, the ladies removed the stitching and viola, 30 x 29 inches, etc. In fact, if the stitching was left in place, it was a perfect, already made pillowcase. Also, in the 30s, they saved the thread from the side seam and later used to hem any of the items.
Today, you can purchase these towels in a bundle of anywhere from 3 to 6 towels. Martha Stewart sells them under the K-Mart name. Others selling them would be Wal-Mart, Rite-Aid, HSN with the Aunt Martha line, Amazon.com. These towels are really nice with the vintage Redwork designs. Downside is that when they get washed, they should be ironed.
Okay, that's probably more than you really wanted to know.
1930s/40s Geek.
Joan/NJ