Comfortable Materials The cute dog collar made of soft and lightweight polyester cotton material,lightweight, fast drying, flexible and skin-friendly,not easy to stick hair, will not hurt your dog's skin while more durable. Size & Measure Have different sizes collar for Small Medium Large Dogs.Please measure your dog's neck girth and refer to our size chart before ordering,using a tape measure or string around your dog's neck.A distance of two fingers between the collar and the dog's neck is recommended. Safety Buckle with D-ring Our quick released safety buckle with gold D-ring, very strong and tight to prevent the collar from accidentally opening, easy to put on, quickly adjust and take off