I'm a tall guy 6ft 1 in 310 and I usually wear 5x so I ordered 5x and they are a bit bigger than most other 5x but as they say , it's actually not bad because it's almost impossible to find large clothes, so keep shopping, just order one size smaller than usual.
Ashers Apparel Schrute Breakfast T Shirt Men's Clothing for T-Shirts & Tanks
34 Review
Ultimate Comfort and Style: Minus33 Merino Wool Ticonderoga Lightweight Men's Clothing, T-Shirts & Tanks
43 Review
Hanes Sleeve T Shirt Large White Men's Clothing T-Shirts & Tanks: Premium Comfort and Versatile Style
33 Review
Men's XXL Super T Mockneck π from Lands End - Clothing, T-Shirts & Tanks
32 Review