The jjk uniform adjustment button refers to a sliding button on the top of the skirt. You can switch the waist size according to it. Generally, it can be divided into zipper adjustment button, sliding adjustment button, and three-speed adjustment button.

The adjustment button of the jk uniform is not on the front nor the back, but on the side. Generally, there will be a pocket next to the zipper of the jk skirt. It is just on the left side to be convenient for hand insertion. If you don't want to use the pocket, you can also put it on the right side. , because on the right side, the pocket is backwards, which is inconvenient.
Under normal circumstances, the position of the zipper of the skirt mainly depends on the style. If the zipper is covered with a piece of cloth, it is usually in the front. The more obvious zipper is in the back. If it is a narrow and thin zipper buried in the fabric Usually on the right. The zipper of the jk skirt is on the left side. This is because the jk uniform was passed down from Japan. The word jk is the abbreviation of the girl's high school student. The jk uniform is the school uniform of the Japanese girl's high school student , while foreigners are used to pulling the zipper on the left with the right hand.