Cavalier King Charles Spaniel
The Cavalier King Charles Spaniel is one of the largest toy breeds. Historically it was a lap dog, and modern day adults can fill a lap easily.
The breed is highly affectionate, playful, extremely patient and eager to please. As such, dogs of the breed are good with children and other dogs. Cavaliers are not shy about socialising with much larger dogs. They will adapt quickly to almost any environment, family, and location.
For more information visit the Wikipedia page