Yearlings are cattle that are 12 months of age.  Market reporters usually do not know the exact age of the cattle and must rely on the physical appearance of the animal to determine the age or in the case of direct cattle the information provided by the contact.  The weight division between calves and yearlings for market reporting purposes is 600 pounds.  No comment is required on yearlings weighing more than 600 pounds, but all yearlings weighing less than 600 pounds must be identified as yearlings.