Which button should you fasten?
Although it might sound obvious to many of you experienced gentlemen out there but….do you know that tradition dictates that you should always leave the bottom button on your suit jacket undone?
So, if you have a 3-btn jacket, only fasten the top 2 and with a 2-btn jacket you should only fasten the top one.
Originally both buttons were fastened but over time the etiquette changed to facilitate the reach of the trousers pockets. By leaving the lower button un-buttoned, gentlemen could finally reach their pockets without struggling too much.
For what concerns sleeve buttons, they are fake/not working on commercial suits, while with high-end and custom suits, you will see opened sleeve buttons (aka working cuffs). Some call it a “show-off” some call it a “personal style detail”. I will leave that up to you.