Wearing a baseball cap is the same as wearing clothes. We should try to make the best of our strengths and avoid weaknesses. Even if we are satisfied with wearing a baseball cap, we should also make people look elegant. The form and color of the hat must match with the clothes, scarves, gloves and shoes. Ladies wearing glasses should not wear a hat with complicated decorations on it. It should not cover your forehead. The hat should be higher, which can show your natural and unrestrained demeanor and elegant temperament. The size of a man's hat is the centimeter of his finger circumference, so it is very convenient to choose. However, considering that some hats will shrink after washing, they should be slightly larger when buying. The cap number of an adult man is 55-56, the cap number of a child is 50-55, and the cap number of a baby is 42-46.