Proud to still be the largest Puppia retailer, we only sell the official Puppia brand. The design of this harness has made Puppia famous and many have attempted to copy it. Beware of counterfeit Puppia harnesses being sold on discount sites. If you need help with sizing, please call us during regular store hours at 848-888-3568 or email us anytime at sales@thenewyorkdogshop.com!