Material: nylon rope, size: 33 * 1cm. Adjustable collar size: 19 * 32 cm, 1 cm wide, suitable for most puppies and small pets. This reflective collar features a bell design for visibility in the dark (note: airtag not included). Easily locate your pet: Our reflective collar is designed for tracking pets with find my app on iPhone. The secure elastic case prevents the airtag from falling off. Latest upgrade: This collar uses a safer circular breakaway safety buckle instead of traditional lug designs. If your pet gets trapped, the buckle releases to prevent choking. Perfect design: Featuring three reflective strips, this collar ensures visibility in low light conditions. It keeps your pet safe during the night. Additionally, the collar comes with a bell, which can be removed if preferred. Light and comfortable: Made from well-sewn nylon, this collar is soft, breathable, and gentle on your pet's skin, ensuring comfort without irritation.