Detroit Pistons Vintage 1988-1989 World Champions T-Shirt - Overall pretty clean, but there is some light pilling over a lot of the fabric, as well as a small hole on the back

Single stitch
Thin & lightweight
Runs closer to a large

Measurements are done lying flat with no stretching and are approximate - 
Shoulders 19 5/8"
Chest (underarm-underarm) 21"
Length (shoulder-hem) 28 5/8"
Sleeve (shoulder-hem) 7 3/4"