80s GAP Pioneer Jean Jacket Classic Blue Denim Button Up Unisex Quality

80s GAP Pioneer Jean Jacket Classic Blue Denim Button Up Unisex Quality Vintage Tag says the size is 16. I’m not sure if it’s kids or adults or what kind of sizing that it. I’ll be listing as a women’s S because it is a great fit for me who wears a 2-4 Pit to pit is 18in Shoulder to bottom hem is 21in Excellent vintage condition, no stains or damage Feel free to ask questions ◡̈