““TABLE 17.3 Official USDA Size Categories for Shell EggsΔ Verified by Egg Board 1981 and 2010. U.S. Weights or Classes, Size Minimum Weight per Dozen, Ounces Minimum Weight* per 30-Dozen Case, Pounds Jumbo 30 56 lbs. Extra large 27 50 1/2 lbs. Large 24 45 lbs. Medium 21 39 1/2 lbs. Small 18 34 lbs. Peewee 15 28 lbs. *Weight may include corrugated fiber case and filler between layers of eggs.””