Unique Vintage Dress

This dress is in excellent condition. It looks like it’s never been worn but the tag has been cut out. I can’t find it anywhere online so I don’t know the brand or exact size. I wear a size Small/2 in dress sizes and this was a comfortable loose fit on me. My guess is it is a Med/4-6. Pit to put it measures 17” and length from top to longest part of the bottom is 37”. The material is also very stretchy and comfortable.