A technology is described for determining an item package quantity. An example method may include extracting a first item package quantity from a first attribute field for a product and extracting a second item package quantity from a second attribute field for the product. The first item package quantity and the second item package quantity may then be classified using a prediction model that determines a likely correctness of the first item package quantity and the second item package quantity. An item package quantity may then be selected from the first item package quantity and second item package quantity having a classification that indicates that the item package quantity is likely correct.