Different Styles of Jacket Sleeve Buttonholes - Henry A. Davidsen
Sleeve Hem Button Options for Jackets and Suits - Proper Cloth Help
Tailors of Distinction - Whether they are are functional or not, a suit jacket will have buttons on the sleeve. A suit jacket with sleeve buttons that come undone (surgeons cuffs) is
The Problem With Functioning Sleeve Buttonholes - The Fine Young Gentleman
Why are there buttons on suit jacket sleeves? Here's what they are for