Out-of-town attendants can be measured at any formalwear outlet (i.e. tux specialty shop, men's shop or bridal shop that rents formalwear...you will receive the best fit from a shop that has try-on stock for you to be sized in.)  This is tuxedo industry courtesy and there is usually no charge to the customer.  Varsity provides a special form to be completed by the local shop and sent directly to the Varsity store where the wedding has been registered.