1920's Mens Sweater History - 1928- By the late 1920′s the trend was for small patterns on mens sweaters. They were still gaudy but tamer color combinations than the mid years. http://www.vintagedancer.com/1920s/1920s-mens-sweaters/
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.
Like women, men loosened the constraints of previous decades and began to acquire a more relaxed, flashier wardrobe. The crease left the pant legs and the tie was abandoned. Colorful suits and patterned socks accented the wardrobe of the casually dressed. The men in the images below sport the casual, laid back look that swept men's fashion during the 1920s.