Birddogs Short Sleeve T-Shirt - Size S

Men's pre-loved Birddogs short sleeve T-Shirt in fair condition, color is heather gray, unsure of the fabric content (no size or fabric tag) but I believe it may be a cotton blend material. My best guess is that this shirt is a size small, therefore listing it as such. Noted flaw - there is a tiny pin sized hole located in the back of the shirt (reference last photo) not obvious but worth noting. Reference measurements for proper fit. Measurements are approximate. Thanks for looking! S