Biro Yorkshire Terrier Official Breed Standard

General Appearance: That of a toy terrier whose long and rich coat is parted on the face and from the base of the skull to the end of the tail.
Head: Small and rather flat on top, the skull not too prominent or round, with thick fur on the top of the head and on the chin.
Muzzle: Not too long
Nose: Completely chocolate brown
Eyes: Medium in size, dark in color and sparkling with an intelligent expression.

Ears: Small, carried erect, V-shaped, covered with short thick hair. (The hair on the upper head and on the chin is long)
Neck: good lay of shoulder, not massive.
Body: Very compact, with level top line, well formed low back and hips.
Limbs: Completely straight, covered with thick hair, paws are round. 
Tail: Undocked, put high, richly covered with hair.
Coat: The hair on the body is long, smooth, with silky sheen.

Color
Head: chocolate-white-gold, symmetrically colored. Important: there must be a clearly pronounced shade of gold on the head.
Body: Chocolate-white or uniform chocolate colour with a white jabot without golden shade on the body. Breast, belly, and legs are white.
Height and weight:
Height up to 22 cm (8,66 in)
Weight up to 3,1 kg (6,83 lbs)
Male animals should have two well-developed testicles fully descended into the scrotum.
Faults:
Absence of characteristic golden colour on the head. Any departure from the foregoing points should be considered a fault.