Russell Terrier
The Jack Russell terrier and Parson Russell Terrier breeds are similar, sharing a common origin, but have several marked differences – the most notable being the range of acceptable heights. Other differences in the Parson Russell 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 which places it within the range of the Jack Russell Terrier Club of America's standard size for a Jack Russell of . However, the Parson Russell is a conformation show standard whereas the Jack Russell standard is a more general working standard.