I usually wear a large size, but on this shirt I bought a medium size because I need a tight (athletic) fit, but the shirt, even a size smaller, is too big!
Gildan Performance Men's π Clothing and Shirts with Moisture-Wicking Polyester
44 Review
Men'S Regular Fit Short-Sleeve Dress Shirts By Allsense - Look Stylish And Professional!
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Men'S Long Sleeve Polo Shirt - Slim Fit, Stretchy, Breathable Collar
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Calvin Klein π Herringbone Sleeve Men's Dress Clothing
50 Review