How to change the waistline of denim bibs?

1. First find the position of the side of the trousers, as shown in the figure below.

2. Then start the needle and sew from the inside to the outside, as shown below.

3. After you get dressed, put the needle down from the outside of your pants, as shown below.

4. Trapezoidal sewing like this, just 4 to 5 stitches, as shown below.

5. It is like this after sewing, as shown in the figure below.

6. Then, tighten the root thread by hand, as shown in the figure below.

7. In this way, the waistline of trousers becomes smaller, and no traces of modification can be seen, as shown below.