Men (at least the highly fashionable ones) wore many accessories in the 1920s. Notice the different types of hats (here we see fedoras, straw boaters, and Newsboy hats). Canes were popular accessories as well as small rings, tie pins, and collar pins.
The revival of men’s style and fashion has, among many style elements, also brought up the different types of men’s hats and gave them a big refresh. If in the past, hats were almost mandatory for a man, today they are optional. Men's hats are in a way like watches. They are not mandatory, so