Vintage Roughrider Band Boosters Music T Shirt Juniors Medium Adult Small ?

Vintage Roughrider Band Boosters Music T Shirt In overall good condition but does have a couple stains. Small one on front and larger one on back. Tag says Medium, it looks like it could be a Juniors Medium possibly could also fit an Adult Small or XS? Please double check measurements before purchase. Pit to pit: 16" Shoulder to bottom: 24" Ships with Tracking in the U.S. (a29)