For the costume in standard size: You can contact us within 24 hours after the order is placed, we will change the size for you free of charge. Or, if you like Clint Barton’s costume from the movies better, try this Age of Ultron Hawkeye children’s costume. People usually wear their favourite character’s outfit or a charascter they know. If one or some of your measurement are beyond the regular parameter,we will send you an email to let you know about the problem.