The YOULY The Protector Reflective Dog Collar is a small neck size collar made of durable nylon material. It features a braided design and is adjustable to fit all dog breeds with a neck size ranging from 10" to 14" (25-36 cm). The collar is designed for all dogs, regardless of gender, and includes reflective features for enhanced visibility during nighttime walks. The smart home protocol included in the collar ensures a secure fit for your furry friend.