The Mudi is a medium-sized, compact dog with an elegant, athletic outline. Males stand 41-47cm (16-18.5in) tall and weigh 11-13kg (24-29lb); females stand 38-44cm (15-17.5in) and weigh 8-11kg (18-24lb). The coat is of medium length, glossy and curly to wavy on the body, with short, smooth hair on the head and the front of the legs. Colors include black, white, brown, yellow (fawn), gray and the striking blue merle. Erect ears and dark, expressive eyes give the breed its characteristically lively, intelligent expression.