true 70s soft cottage core button-down! peep that old tag!
I believe it's sized a '24.5,' but works for up to an XL-XXL or so -- see measurements below:
pit-to-pit: 20.5"
length: 24"
*shirt has some VERY minor discolorations due to age, but they aren't too noticeable at all since it's mostly on that inside collar!*