15 Cool Facts About Jack Russell Terriers By Allen Abby - Those who stand 10 to 12 inches and are longer than they are tall are classified as Shorty Jacks, which display similarities to Corgis or Dachshunds They predominantly have white coats (at least 51%) with black and/or brown and/or tan colorations. Jacks can either have smooth, rough, or broken coats. Please follow and like us: