Until the 1920s, the Cavalier shared the same history as the smaller King Charles Spaniel. The duke recorded that they were able to keep up with a trotting horse. Mrs Neville Lytton' in 1911. Historically the Cavalier King Charles Spaniel was a lap dog and is small for a spaniel, with fully grown adults comparable in size to adolescents of other larger spaniel breeds. Breed standards state that height of a Cavalier should be between 12 to 13 inches (30 to 33 cm) with a proportionate weight between 13 to 18 pounds (5.9 to 8.2 kg). The tail is usually not docked, and the Cavalier should have a silky coat of moderate length. Standards state that it should be free from curl, although a slight wave is allowed.