Question: are eggs sold by weight?
Answer: The U.S. Department of Agriculture places eggs in six categories, based on the net weight of an entire dozen. That's weight, not size. The designations and their minimum by-the-dozen weights are jumbo (30 ounces), extra large (27 ounces), large (24 ounces), medium (21 ounces), small (18 ounces) and peewee (15 ounces).