I usually wear a large shirt size - I'm more of an athletic build - but when I got my large, I was swimming in it. I'm 5'7", 175lbs. I ordered a medium and it fit just right.
Men'S Long Sleeve Polo Shirt - Slim Fit, Stretchy, Breathable Collar
43 Review
H2H Mens Casual Slim Fit Short Sleeve T-Shirts Cotton Blended Soft Lightweight V-Neck/Crew-Neck
46 Review
π Nantersan Placket Raglan Tee - A Casual Must-Have
52 Review
Gildan Performance Men's π Clothing and Shirts with Moisture-Wicking Polyester
44 Review