Vintage Robert Arnold Red Belted Button Down Short Trench Coat-Size 11/12

This is a super unique, beautiful ladies vintage trench coat in very good condition. Looks like it could possibly be from the 70's or 80's. There is slight darkening around the cuffs that is barely noticeable and I see no other stains, rips or pilling. This coat was very well preserved It has chest pockets, attached belt and a bit of elastic on the waist sides. The size tag says 11/12 however it seems to fit a small. I am 5'4", 115lbs and it fits perfectly. Measurements are as follows, taken laying down flat: Pit to bottom of coat approx 17" Chest approx 19" Waist (untied) approx 17" Shoulder to bottom of coat approx 26"