The Cavalier King Charles Spaniel wears his connection to British history in his breed's name. Cavaliers are the best of two worlds, combining the gentle attentiveness of a toy breed with the verve and athleticism of a sporting spaniel. The Cavalier's all-around beauty, regal grace, and even temper mark him as one of dogdom's noblemen. A toy spaniel no more than 13 inches high, the Cavalier draws you in with his face: The sweet, gentle, melting expression emanating from large, round eyes is a breed hallmark. Another is the silky, richly colored coat that can be one of four distinct varieties (described in this page's History section). Cavaliers may be aristocrats, but they gladly descend from their royal high horse for a backyard frolic or a squirrel chase. They get along nicely with children and other dogs. Adaptable Cavaliers do equally well with active owners and homebodies. They can be upbeat athletes or shameless couch potatoes, depending on an owner's lifestyle.
References:
https://www.akc.org/