Vintage plaid shift dress size‎ large

Vintage plaid shift dress. Tag reads as a size 12. It’s modeled here on a size medium who is 5’1 and 130 lbs for reference. It was loose so I’m recommending for a size large. Zips up the back. Also has a small slit on the back. Approx measurements- Bust- 36 inches Waist- 16 inches Hips- 20 inches Length- 36 inches