Vintage 80s Blueberry Hill Blue Button Up shirt With White Collar Size M?

Vintage 80s blue striped button up shirt with white embroidered collar. Polyester/cotton blend. Definitely Nancy from Stranger Things vibes. Good condition, no stains or holes but there is a little pilling. No Size tag but I’d guess a Medium. Check measurements below for sizing. Pit to Pit: 20” Shoulder to hem: 25”