Advice on finding Knapp Tuxedos - Use Decidio’s directory of Knapp tuxedo rental and formal wear shops when searching for the best tuxedos in your area. When researching the different styles of tuxedos, try to determine the color tux you want and if you have a preference between a single-breasted or double-breasted jacket. Don’t worry, all reputable Knapp tuxedo rental shops offer the complimentary service of measuring someone, even if you are renting your tuxedo somewhere else. Many Knapp tuxedo rental shops also offer discounts for wedding parties, so don’t forget to ask!