There’s a height limit for Beagles in order to be classified as part of the breed. In the United States, Beagles are generally classified into two different sizes. There are those that are stand under 13 inches, which is relatively small compared to other breeds. Beagles are generally considered to be in the category of small dogs anyway. But there are Beagles that are slightly bigger. The U.S. classifies another breed size that’s over 13 inches, but they have to be under 15 inches tall. Anything over that number will probably classify the dog apart from the Beagle breed. In England, the size classification is just a little different. A Beagle can be as tall as 16 inches high. That’s a 3-inch difference from the 13 inches that is standard for most Beagles in the U.S.