So I'm about 5'8", weigh 155 pounds, have a 30" waist and I ordered the small model. My chest is about 38 inches and this fits me perfectly! I've had tanks from many other companies including J Crew, Target, Banana Republic and they really do fit the best, are softer material and don't shrink too much in the wash. I have actually ordered 3 more which I highly recommend.
Van Heusen Traveler Stretch Men's Shirt
47 Review
INFLATION Bamboo Shirts Sleeve Elastic Men's Clothing in Shirts
45 Review
Men'S Regular Fit Short-Sleeve Dress Shirts By Allsense - Look Stylish And Professional!
41 Review
Men'S Long Sleeve Polo Shirt - Slim Fit, Stretchy, Breathable Collar
43 Review
Off White Men's Clothing: Amazon Essentials Lightweight Active Sweatshirt
42 Review
Carhartt Crewneck Sweatshirt Regular X Large
42 Review
Optimized Airflux Sleeve for PGA TOUR Standards
43 Review
Newzill Compression Calf Sleeves (20-30MmHg) For Men And Women - Ideal Alternative To Compression Socks, Perfect For Running, Shin Splints, Medical Needs, Travel, And Nursing
42 Review