WOW! Here is a vintage (circa 1991) size MEDIUM Boston Celtics T-Shirt that is in MINT condition! It still has a NBA sticker on it, and it doesn't look like it has been worn!
It measures 21 inches across the chest measured under the arms and from the back of the neck band to the bottom hem is 29 1/2 inches. The neck tag says it is a large--but that is OLD SCHOOL size...in today's size this is a MEDIUM. This T-Shirt is 100% cotton. There are no holes or stains