Taking in the waist of jeans is a common alteration that can be done to make jeans fit more snugly around the waist. This can be done for a variety of reasons, such as weight loss, changes in body shape, or simply to achieve a more desired fit.
There are a few different ways to take in the waist of jeans, but the most common method is to sew darts into the side seams. This involves taking in small triangular sections of fabric from the sides of the jeans, which reduces the overall width of the waistband. Another method is to remove a section of fabric from the center back of the waistband and sew the two cut edges together. This method is less noticeable than sewing darts, but it can be more difficult to do.