General Appearance:  The Jack Russell is a hard working terrier of great strength and endurance.  They are available in both smooth coated and rough coated varieties.  The color should be predominantly white with tan and/or black markings

Size, Proportion, and Substance:  Jack Russells stand 12 to 14 inches at the withers and weigh 12 - 18 pounds.

Background:  The Jack Russell Terrier is sturdy and active making him well suited to family life.  Jack Russells are at their best when given a job to do and generally work well around horses - they can often be found controlling rodent populations on farms.  They are intelligent and highly trainable.  A high energy level makes daily activities essential to keep him a "Happy Jack."