If you're looking to resize a leather jacket, the cost will depend on the tailor and the level of customization required. On average, you can expect to pay between $50 and $100 to have a leather jacket resized. This price may be higher or lower depending on the tailor's experience, the quality of the materials used, and the amount of work required to resize the jacket. For example, if you need to have your leather jacket taken in at the waist, this will require less work than if you need to have it lengthened or shortened.