The Yorkie poo generally results from crossing a Yorkshire terrier with a toy or miniature poodle, not the larger standard poodle. The Yorkshire terrier breed standard doesn't specify a height, but most Yorkies stand between 8 to 9 inches tall at the shoulder in maturity. The breed standard does specify that a Yorkie can't weigh more than 7 pounds. Toy poodles stand less than 10 inches at the shoulder when full grown, while miniature poodles stand between 10 and 15 inches. While either size poodle parent means the Yorkie poo stays relatively small, expect a puppy with a miniature poodle mom or dad to grow somewhat larger.
The Yorkie breed standard specifies blue and tan coloration, while poodles can be any solid color. Thus, Yorkie poos might appear in a variety of shades. Like other poodle crosses, the original intention of this blend was creating a curly, nonshedding coat on the hybrid dog. Some Yorkie poos take after the poodle parent in this respect, while others favor the longer, silkier hair of the Yorkshire terrier.