So far every product I've tried from Comfortably Collared has fit wonderfully for my slim build - I always hated having shirts with extra loose fabric around the waste and I don't have that problem with these.
H2H Mens Casual Slim Fit Short Sleeve T-Shirts Cotton Blended Soft Lightweight V-Neck/Crew-Neck
46 Review
Men'S Long Sleeve Polo Shirt - Slim Fit, Stretchy, Breathable Collar
43 Review
INFLATION Bamboo Shirts Sleeve Elastic Men's Clothing in Shirts
45 Review
Calvin Klein π Herringbone Sleeve Men's Dress Clothing
50 Review