Vintage Extremely Rare Fleetwood Mac November 1979 Madison Square Garden T Shirt

It was never worn. You can tell by the tag. It’s almost 45 years old. It was purchased at their concert November 1979 at Madison Square Garden. I know because I purchased it. It’s airbrushed and signed. No rips or tears. It’s a medium, but a medium today was not a medium then so see measurements