Black Eyelet Swing Dress

I bought two different sized from Unique Vintage not knowing which size would fit best. I did not realize that I would be unable to return the other one so now I have two! It is 100% cotton and feels substantial with practical details like pockets and a side zip. It is a classic style and love the fit. I am keeping the size which works best for me. The website says it has a 39” length and runs small.