Here's a vintage USA track & field tee for the Worlds Veterans Championship held in Eugene/Springfield in 1989. White crew neck short sleeve tee is labeled 'Stedmans Super 50', it's 50% poly and 50% cotton.
Pre-owned, used; has a stain on the front that didn't come out when I washed it.
Marked size XL- it's a vintage tee and is smaller than modern tees. Actual shirt measurements are--
Pit to pit- 22 1/2"
Center front- 25 1/2"