LuckyPet Embroidered Adjustable Martingale Collar - Custom embroidered nylon walking collar for greyhounds and other breeds. Personalized Martingale Dog Collar - Customized with Your Pet's Name or Your Phone Number! Nylon Martingale Greyhound Dog Collar - Adjusts 10 to 20 inches - Slips over head to be put on TO ORDER: 1) Choose color, 2) Click CUSTOMIZE NOW to provide your peronslized embroidery info See ALL DETAILS Under PRODUCT DESCRIPTION Below 100% Customer satisfaction; LIFETIME GUARANTEE