I ordered 16.5 x 34 and got the shirt marked L, 34/35. My neck is 16.5. This shirt fitted well. When I pull the collar it's tight but not uncomfortable. Sleeve length is good. The chest is big enough but not tented (my chest is 42 and I have a typical middle-aged belly). The kit included small black plastic bolts which I replaced with my own. You can use buttons or links on the cuffs. I have nothing to complain about in terms of size and workmanship.
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
Optimized Airflux Sleeve for PGA TOUR Standards
43 Review
Crewneck Fleece Sweatshirt For Men By Goodthreads
48 Review
Off White Men's Clothing: Amazon Essentials Lightweight Active Sweatshirt
42 Review