This is a GENUINE VINTAGE graphic college sports tee from the 70s or 80s. I've never seen one like this- it's an OSU Beavers tee but cut sideways (the opposite of usual) with the short sleeves cut-in-one with the body. That makes them dolman sleeves which are usually seen on women's clothing. I'm calling it unisex; it is crying to be worn with some high waist jeans!! 
 
Made of heavyweight 100% cotton knit, labeled as 'quality activewear, SM, signature sportswear' made in Parsons, Kansas, USA. Pretty danged cool vintage tee! I went to OSU; I should probably keep it... nah :-) 
 
Pre-owned, used; in good condition with no noted flaws. 
 
Marked as size XL or extra large; please read the actual garment measurements given next-- 
 
Pit to pit- 25-ish inches. Dolman sleeves are TERRIBLY HARD to measure! 
Center front length- 24 1/2"