There is no recognized breed of miniature Chow Chow. However, Chows can vary greatly in size from 40 pounds to over 70 pounds. Chows are an ancient breed originating in China. There are several other breeds of dog from the same region that are smaller and look similar.
One of these similar breeds is the Shiba Inu, a breed of Spitz from Japan, which could be mistaken for a miniature Chow since it has similar coloration. The Pomeranian also can share similar features with the Chow, including the bushy lion-like coat, but it is much smaller. The Keeshond is a medium-sized dog that is also a member of the Spitz group of dogs and that has a bushy coat.