1. First, pull the elastic band and cut the belt to the length you want. In addition, the belt is double. Remember to cut it twice as wide as the belt, and of course, add the hem.

2. Cut the elastic band to the length you need and sew on both sides.

3. Sew both ends of the rubber band and belt into a circle.

4. First, align the seam position of the elastic band with the waist head, fold the waist head in half to wrap the elastic band, then stretch the elastic band to the same length as the belt, and make cutting marks at 1/2 and 1/4 respectively. It is very important to pay attention to cutting, which will determine the uniformity after shrinkage.

5. Then wrap the elastic band and sew it. If you need to press the thread on the belt, you need to pull the rubber band to press the thread.

6. Then put the finished waist on the trousers.