Buying clothes online is usually very troublesome, there is no way to check the fit, and returns can be troublesome. First, clothing must be sold in US size. I have the XXL and it fits like a large, they should be snug on the chest and arms, flow in the middle and be a bit longer than regular t-shirts.
Ultimate Comfort: Discover the Comfort Colors Sleeve 6014 - X Large Men's Clothing, T-Shirts & Tanks
40 Review
Men's XXL Super T Mockneck π from Lands End - Clothing, T-Shirts & Tanks
32 Review
Carhartt Workwear XXXXX-Large Men's T-Shirt β Original Clothing for T-Shirts & Tanks
34 Review
Ultimate Comfort and Style: Minus33 Merino Wool Ticonderoga Lightweight Men's Clothing, T-Shirts & Tanks
43 Review
Men'S Regular Fit Short-Sleeve Dress Shirts By Allsense - Look Stylish And Professional!
41 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
INFLATION Bamboo Shirts Sleeve Elastic Men's Clothing in Shirts
45 Review