On the whole, there is a front piece with a front door blade, a zipper side pocket and a back pocket on the back piece.

There are four buttons on the waist of trousers from top to bottom: leather label, washing label, size number and waist head.

The total length of the joint between the rear panel and the rear panel is called back wave, and the total length of the joint between the two small crotch bends and the front door is called front wave.

The combination of the front panel and the back panel is called side seam, also called outer seam, and inner crotch, also called inner length.

Below is called the trouser mouth, also called the trouser leg mouth. The one in the mouth is called hem. There are two kinds: varus and valgus.