The Jack Russell Terrier and Parson Russell terrier breeds are similar as they share a common origin, but with several marked differences—the most notable being the range of acceptable heights. Other differences in the Parson can include a longer head and larger chest as well as overall a larger body size. The height of a Parson Russell at the withers according to the breed standard is 12–14 inches (30–36 cm) which places it within the range of the Jack Russell Terrier Club of America's standard size for a Jack Russell of 10–15 inches (25–38 cm). However the Parson Russell is a conformation show standard whereas the Jack Russell standard is a more general working standard.
View Jack Russell Terrier characteristics on BreedRank.