The American Kennel Club recognizes two breeds of springer spaniels: the Welsh springer spaniel and the English springer spaniel. They're very similar in size, with the Welsh springer averaging about 18 inches at the shoulder and the English standing a bit taller, a little more than 19 inches.
Taller, Heavier English Springer Spaniels
When you're talking about the springer spaniels, the boys of the breeds are a little bigger than the girls. A male Welsh springer spaniel ranges between 35 and 50 pounds and 18 to 19 inches tall; a female tends to weigh the same, but she runs about an inch shorter, between 17 and 18 inches at the shoulder. The male English springer spaniel is usually bigger all around, hitting the scales around 50 pounds and standing between 19 and 21 inches tall. He's got a good 10 pounds on his female counterpart, who usually is 18 to 20 inches at the withers. As well, the English springer spaniel's weight varies according to his lineage. If he's from a hunting line, he'll weigh a bit less than if he's from a show line. Though both breeds are roughly the same size and are loyal family members, there are a few noticeable differences. The Welsh has a more muscular appearance, despite his smaller frame. He's also a little less active and sports a shorter coat than his English cousin.