Size. Size M (27-40cm), quick release buckle; All pet collars are designed in the USA and handcrafted with love. This unique and stylish collar is on the cutting edge of fashion and stands out! Designed with an adjustable quick-release buckle to ensure your cat stays beautiful and secure in all circumstances. This necklace is sold separately. The corresponding belts / harnesses / double belts are sold separately. The super cute packaging makes it a perfect gift for furry companions or people who love animals.