Recently I was lucky enough to come across just a couple 30s feedsack style dresses. These dresses are so easy to wear and my favorite style of clothing from the 1930s. If you happen across one in decent condition in your size, I recommend you pick it up! You'll wear it just as often as that cotton 50's sundress and everyone will tell you how unique and wonderful it is.
There are a few of these dresses available online right now, check this one and this one out!