Step 1: First, determine your waist size, and then measure the belt size that needs to be modified for this pair of jeans. Subtract your actual waist size and you will know that jeans are mostly missing. Step 2: Carefully disassemble the waist. According to the size of the trousers, the extra parts can be put into both sides of the trousers, and more seams can be sewn accordingly. When sewing, remember that the lines should be smooth, and you can't suddenly close your mouth, which will be too abrupt and make both sides uncomfortable to wear. Step 3: After sewing on both sides, if you remove the waist, you need to reinstall the waist. When the waistline fits, you have successfully modified a pair of jeans with an oversized waistline. Isn't it simple? You can slim down and change your pants as follows: Step 1: Cut off all the edges of the water mill printed jeans. Step 2: Then according to your own situation, cut your pants short according to a certain size. Step 3: Finally, sew the original side seam carefully, so that there will be no trace, no change, and the pants will be smaller. Pants generally refer to clothes worn below the waist, which are usually sewn by a waistband, a crotch and two trouser legs. At the earliest time, the ancient people's trousers were very loose and tied around their waists with ropes, but women didn't. They don't need to work. Later, gender equality was formed, and women had to work. With pants, pants become tight.