In length, the smallest living dog is one of this breed, 6 inches from the nose to the tip of the tail
At three weeks old, 
Tom Thumb measured less than 4 inches from nose tip to tail tip;... [DOC] [TLE] Extreme Dogs: The Ugliest, the Biggest, the Smallest, the Tallest, the ... [PAR] Mar 4, 2012 ... One of the smallest dog breeds in the world is Yorkshire Terrier.