I'm 1.70 m tall, have a size 40 jacket and a 73.5 cm waist. Size 29x30 levy 501s. The medium fits snugly around the shoulders and arm but fits perfectly around the waist. If you have an athletic and slim build, buy your size and it will fit you. If you have a slightly bigger stomach, you can buy a shirt one size larger, or better yet, don't buy a sport/skinny shirt.
Van Heusen Traveler Stretch Men's Shirt
47 Review
Calvin Klein π Herringbone Sleeve Men's Dress Clothing
50 Review
Gildan Performance Men's π Clothing and Shirts with Moisture-Wicking Polyester
44 Review
H2H Mens Casual Slim Fit Short Sleeve T-Shirts Cotton Blended Soft Lightweight V-Neck/Crew-Neck
46 Review