The following are common distinguishing characteristics of the Lleyn breed.
HEAD: Distinctive and feminine; warm white in colour; wide forehead; good length from eye to nose – straight to slightly dished and narrowing towards the nose; bright, lively eyes; black nose.
EARS:Medium size and thickness and black spots desirable; base preferably starting from the wool.
NECK: Average length, well set on shoulders.
BREAST: Wide and well forward.
SHOULDER: Well set.
RIB: Long and well arched.
BACK: Good length.
LOIN: Broad; well joined to rump, well set tail.
LEGS: Average length, with no wool lower than hock. Colour warm white.
BONE : Flat.
TAIL: The tail should be docked according to current practice.
WOOL: Containing no kemp, of good length, dense and of high quality.
RAMS: Hornless.