Cuyana for Real Simple brand Black Sheath in M with Exposed Black Zipper.
Intricately designed, every part of this dress is intentional. It is incredibly well made and meant to be a closet staple.
Fabric is a cotton, modal and spandex blend. There is a very comfortable amount of stretch. It is a slightly heavier fabric, would be a good three season dress, would be heavy outside in the summer.
This dress should be sized down. The sleeves are particularly small for a Medium.
Bust: 18" across.