The Cavalier Breed Standard (or how your Cav should look!)

This in the breed standard of Ther Kennel Club (GB) and is used in Australia.

General Appearance: Active, graceful and well balanced, with gentle expression.
Characteristics: Sporting, affectionate, absolutely fearless.
Temperament: Gay, friendly, non-aggressive, no tendency towards nervousness.
Head and Skull: Skull almost flat between ears. Stop shallow. Length from base of stop to tip of nose about l½ inches. Nostrils black and well developed without flesh marks, muzzle well tapered. Lips well developed but not pendulous. Face well filled below eyes. Any tendency to snipiness undesirable.
Eyes: Large, dark, round but not prominent; spaced well apart. Ears: Long, set high, with plenty of feather.
Mouth: Jaws strong, with a perfect, regular and complete scissor bite, i.e. the upper teeth closely overlapping the lower teeth and set square to the jaws.
Neck: Moderate length, slightly arched.
Forequarters: Chest moderate, shoulders well laid back, straight legs moderately boned.
Body: Short-coupled with good spring of rib. Level back.
Hindquarters: Legs with moderate bone; well turned stifle - no tendency to cow hock or sickle hocks.
Feet: Compact, cushioned and well feathered.Jackson
Tail: Length of tail in balance with body, well set on, 

carried happily but never much above the level of the 

back. Docking previuosly optional when no more than 

one-third was to be removed.
Gait: Free moving and elegant in action, plenty of drive 

from behind. Fore and hind legs move parallel when 

viewed from in front and behind.
Coat: Long. silky, free from curl. Slight wave permissible. 

Plenty of feathering. Totally free from trimming.
Colours: Recognised colours are:-

Black and Tan: Raven black with tan markings above the eyes, on cheeks, inside ears, on chest         and legs and underside of tail. Tan should be bright. White marks undesirable.
Ruby: Whole coloured rich red. White markings undesirable.
Blenheim: Rich chestnut markings well broken up, on pearly white ground. Markings evenly         divided on head, leaving room between ears for much valued lozenge mark or spot (a unique characteristic of the breed).
Tricolour: Black and white well spaced, broken up, with tan markings over eyes, cheeks, inside ears, inside legs, and on underside of tail.
Any other colour or combination of colours most undesirable.
Weight and Size: Weight - twelve to eighteen pounds. A small well-balanced dog well within these weights desirable.
Faults: Any departure from the foregoing points should be considered a fault and the seriousness with which the fault should be regarded should be in exact proportion to its degree and its effect upon the health and welfare of the dog.

Example pic