You're clenching too tight. Start out with a good fit from the prewash, after a few wash and dry cycles they will shrink into belly shirts.
Ultimate Comfort: Discover the Comfort Colors Sleeve 6014 - X Large Men's Clothing, T-Shirts & Tanks
40 Review
AM Fitted T Shirt 3 Pack for Men's Clothing - T-Shirts & Tanks
46 Review
Carhartt Workwear XXXXX-Large Men's T-Shirt β Original Clothing for T-Shirts & Tanks
34 Review
Next Level Premium Fitted N6210: High-Quality Men's Clothing & Essential T-Shirts + Tanks Collection
39 Review
π Nantersan Placket Raglan Tee - A Casual Must-Have
52 Review
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
Gildan Performance Men's π Clothing and Shirts with Moisture-Wicking Polyester
44 Review