Traditional knuckle tattoos, also known as old-school knuckle tattoos, are a unique style of tattoos that have become increasingly popular in recent years. They are characterized by bold, bright colors, thick black outlines, and a vintage feel. They often feature iconic images, such as skulls, anchors, and flowers. These tattoos are often placed on the knuckles, as the name implies, but they can also be placed on other parts of the body.