Woodfield Leather necklace with ribbon charm. The color is natural. My dog chewed on it immediately after putting it on, so I gave up after wearing it for about a minute twice. Although it was worn for a short time, there are bite marks. The size is about 6 cm in diameter when the smallest, and about 10.5 cm in diameter when the largest. I think it can be used for dogs with a wide range of neck sizes. For reference, my dog is a 2.3 kg Toy Poodle.