One size down if you want it to fit like a regular size t-shirt. Despite this, the sleeves are about 1 inch longer and will need to be adjusted if you want them to fit like a regular t-shirt. Unlike other shirts, they come out of the dryer crumpled. The collar is quite small, but it's not very noticeable on a shirt. All in all not a bad buy, just go down a size and live with the sleeves or adjust them for you.
AM Fitted T Shirt 3 Pack for Men's Clothing - T-Shirts & Tanks
46 Review
Ultimate Comfort and Style: Minus33 Merino Wool Ticonderoga Lightweight Men's Clothing, T-Shirts & Tanks
43 Review
Ashers Apparel Schrute Breakfast T Shirt Men's Clothing for T-Shirts & Tanks
34 Review
Next Level Premium Fitted N6210: High-Quality Men's Clothing & Essential T-Shirts + Tanks Collection
39 Review