Billow Bling Rhinestone Crystal Metal Bowknot Faux Cow Suede Leather Collar for Pets Please compare with below size before confirm order (please allow about 1cm measuring error) Size XS: Total length 2.5*30CM, adjustable length 21-27CM Size S: Total length 2.5*37CM, adjustable length 27-33CM Size M: Total length 2.5*42CM, adjustable length 33-39CM Cute lovely and fashionable style for your little pet dog