How tight are buttoned collars supposed to be on men's dress

Why is the last button on men's shirts a different thread color? - Quora

How Your Shirts Should Fit

How long should the sleeves on a men's dress shirt be? - Quora

How Should a Dress Shirt Fit?

What Do the Numbers on Men's Dress Shirts Mean? – Twillory

White Dress Shirts You Can Wear Under Any Suit

How should sleeves fit on a dress shirt? - Quora

How A Men's Dress Shirt Should Fit (Ultimate Men's Guide)

Loose Shirt Vs Tight Shirt - Should A Shirt Be Tight? Tapered Menswear

Why are men's shirts with collars considered more formal than those without? - Quora