Vintage Blue Wool Naval Academy Midshipmen Jacket Size Med Approx

21” armpit to armpit 30” shoulder down There are no tags in this coat anywhere it was purchased at a military doctors estate sale and is in good condition except for some fuzz on the sleeve caps and a few random feathers from being stored next to a down parka. Smoke free home please measure something you already have to know that if this is the right size for you I have provided measurements and I do not take returns my best Guess is this from the 70s