Dolan Sample Zip Jacket with Removable Belt

Army Green Dolan Sample Zip Jacket Super cute zip up jacket that I bought at a Dolan sample sale! There are no labels on it and I’m not positive they ever produced it. Could also be worn as a dress! Belt at waist is removable. For reference: I am 5’6 and typically wear a size M/6 (my measurements are 40-29-40). This particular piece is a little snug on my arms, but fits every where else! Would probably fit a size S/4 best!