Since we are a made-to-order and made-to-measure brand, a size exchange is not applicable until and unless the product received is wrong or damaged. If the product received is wrong or damaged, then the exchange needs to be filed via email within the first three days of receiving the package at contact@mannattgupta.com. If your exchange gets approved, then the new product will be shipped out to you after the wrong/damaged product is returned from your end. To avoid any size issues, we recommend that you go through our size guide before placing a standard-sized order. If our standard sizes do not work for your body type, then we would recommend placing a made-to-measure order instead. There are no additional charges involved for this service.