Your bridesmaid should contact the dress designer or boutique right away. Some shops will allow exchanges for another dress style or size. “If the dresses were ordered far enough in advance, there may be enough time to order a new dress or the designer can check to see if there is a larger size in their inventory,” Turner says. Your bridesmaid should also ask if the designer offers the option to purchase additional fabric. Usually, you can order an extra yard or two in the same fabric of the dress for alterations.