There have been a few threads discussing the best dress and business casual shirts. My strong preference if for Brooks Brothers' slim (Regent) fit non-iron Oxford. The come in four cuts (regular, slim, extra slim large) and they fit to the precise inch, not 33/34 like most brands. A 34 inch sleeve is a 34 inch sleeve, a 16 inch neck is precisely a 16 inch neck. In my humble opinion if you measure yourself correctly and order the right fit, they are as good as custom, with the quality that can only be matched by a large scale premium retailer.
They are on sale now only now through the 27th where if you order four shirts they are 40 percent off plus another 15 percent off. End price is about $46 a shirt, which is almost half off. It's a tremendous deal. If you're looking for dress or causal button shirts, now is the time to get them.
https://www.brooksbrothers.com/on/demandware.store/Sites-brooksbrothers-Site/default/Home-Show?cmp=ppc_us_msn_branded_S_B_A_Brand&msclkid=1fb3e3824d4a1096a9f1bfa0e8ae9360&utm_source=bing&utm_medium=cpc&utm_campaign=S_B_A_Brand&utm_term=brooks%20brothers&utm_content=Brooks%20Brothers%20Exact&gclid=CNnhxf76u98CFfmDxQIdfSgO4A&gclsrc=ds