Government technical standardUSDA AMS
Shell Eggs: USDA Grades and Voluntary Grading Service
United States Standards, Grades, and Weight Classes for Shell Eggs (AMS 56); 7 CFR Part 56
USDA shell-egg grades provide a common description of quality and weight under the AMS grading framework. Grade AA, A and B refer to defined quality characteristics and tolerances rather than nutritional superiority or an absence of pathogens. The voluntary official grading service involves USDA supervision and controlled use of the grademark. Grade, size and food-safety obligations should be evaluated separately.
