Generally speaking, the waistline of jeans is just right when they are just bought back, but after a long time, pants will get fatter and fatter, especially at the waist. If you don't have time to transform it, you can solve it with only one belt, which can not only reduce the waist circumference, but also be used as decoration or rubber band.
If you have time to refit, you can sew the extra parts on both sides of jeans with a needle, and remember that both sides must be symmetrical so as not to affect the effect of wearing them out. If the waistline is too big, it can be sent to a tailor's shop for professional modification. Generally speaking, if the jeans you just bought are too big to wear, you can go to the store to change them, provided that it does not affect the secondary sales, can't be washed, or you can give them to your friends.
The size of jeans is a common problem. After some people lose weight, they can't continue to wear the jeans they bought before, and their waistlines will be fat. Jeans have been left too long, and we can still use them as dolls to avoid wasting them.