An adult Australian Shepherd and beagle mix typically weighs between 25 and 40 pounds and stands anywhere from 15 to 20 inches tall. Weight and height vary depending on the size of the mixed breeds' parents.
When mixing dog breeds, it is impossible to tell which breed characteristics will be dominant in the puppies. However, by comparing each breeds size, a general range can be determined. Female Australian Shepherd’s generally grow 18 to 21 inches tall and weigh between 40 and 55 pounds. Males generally stand between 20 and 23 inches tall and weigh 50 to 65 pounds. Female beagles generally measure from 13 to 15 inches tall and weigh between 20 and 23 pounds. Males stand 14 to 16 inches tall and weigh between 22 and 25 pounds.
The size of an Australian Shepherd and beagle mixed breed dog may fall anywhere in the above noted height and weight ranges. For example, the mixed breed may grow up to be on the taller, heavier scale if a large Australian Shepherd is bred to a large beagle. Alternately, the dog may grow to be on the smaller side if both the of the dog's parents fall in the smaller range.