This is a vintage golf shirt labeled 'La Mode Du Golf', probably from the late 80s to early 90s. Made of silky polyester, it has a sorta abstract blue and white print, 2 button pullover with collar, short raglan sleeves. 
 
Pre-owned, used. In good condition EXCEPT I just noticed it's missing a button on the front tab. I'll replace the button before it gets mailed :-)
 
Marked as size XL; please read the actual shirt measurements--
Pit to pit- 25 1/2" measured across the front between the underarm seams
Hem- 48" around
Raglan sleeve length- 18 3/4" from base of collar to sleeve hem
Sleeve hem- 15" around