1. Be sure to reduce the size and fold the jeans inward.

2. Sew the folded part with the same color needle and thread.

3. Sew the other side of symmetry in the same way.

Method 2:

1. Take an elastic band, pinch one at the back of the belt, and put the elastic band directly on the back waist.

2. The waist circumference can be reduced by 2-3 cm after sewing.