Boys: Feet pants, red belt, white casual shirt on the top, and it is best to have a red plaid lining at the neckline, so that the red belt at the waist can echo the neckline, or a casual T-shirt, a slightly slim version, directly covers the belt. If it's not feet pants, you can roll up your pants a little and turn them into a pair of cropped pants, exposing your ankles, so that the matching above will be very suitable.
Girl: It's a good match. Girls could have worn fancy clothes. The upper body can be chiffon, modal shirt, cotton slim T-shirt, etc. There are many choices. According to the color of the clothes, match a pair of shoes with the same color as the belt, or bring a hairpin with the same color.
However, this collocation is also related to many things, such as personal figure, skin color and so on. ,,, and above are just personal favorite combinations.