Spaniels are several breeds of long-haired sporting dogs that are used to flush game animals from heavy cover where hunters cannot easily trek. While there isn't a breed specifically named "British spaniel," there are two breeds of English spaniels -- the English springer spaniel and the English cocker spaniel.
Size of an English Springer Spaniel
English springer spaniels are medium-sized dogs, slightly larger than English cocker spaniels. This breed's ideal height, according to the American Kennel Club breed standard, is 20 inches at the withers for males and 19 inches for females. The ideal weight can range from 40 pounds (for a 19-inch female) to 50 pounds (for a 20-inch male).
Size of an English Cocker Spaniel
English cocker spaniels are smaller than their springer cousins. This breed can reach heights of 16 to 17 inches at the withers for males, and 15 to 16 inches at the withers for females. Males can weigh between 28 and 34 pounds, while females weigh slightly less -- between 26 and 32 pounds.