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. It is similar to Scotty Cramp, a genetic disorder in Scottish Terriers. About 1% of Cavaliers are affected by the condition, with 19% being carriers. Dogs with whole colored coats were more likely to be affected than dogs with parti-colored coats.