Corriedale wool ranging from 25 to 30 microns diameter. Fleece from a mature ewe will weigh with a staple length of . After cleaning, a yield of 50 to 60% of the raw fleece weight is common. Mature rams will weigh ; ewes can weigh from . This breed was developed in Australia and New Zealand by extensive breeding and culling as a cross between Merino and Lincoln sheep The goal was to develop a breed that would thrive in lower rainfall areas and supply long-staple wool. James Little was the original breeder. The name comes from a property in the
Breed standard of the members of the organization which authors them change. In general, a breed standard may include history of the breed, a narrative description of the breed, and details of the ideal externally observable structure and behavior for the breed. Certain deviations from the standard are considered "faults". A large degree of deviation from the breed standard, an excess of faults, or certain defined major faults, may indicate that the animal should not be bred, although its fitness for other uses may not be impeded by the faults. An animal that closely matches (conforms to) the breed standard for its