I think the sizing is a bit off. I wear women's 8 1/2 sizes and based on the size chart and reviews I ordered medium. They fit, but there's no room to shrink at all. I think they can also become easily addicted.
H2H Mens Casual Slim Fit Short Sleeve T-Shirts Cotton Blended Soft Lightweight V-Neck/Crew-Neck
46 Review
Van Heusen Traveler Stretch Men's Shirt
47 Review
Men'S Regular Fit Short-Sleeve Dress Shirts By Allsense - Look Stylish And Professional!
41 Review
Men'S Long Sleeve Polo Shirt - Slim Fit, Stretchy, Breathable Collar
43 Review