The “Size” written on a carton of a dozen Eggs does not refer to the dimensions of an Egg or how big any of them look. Instead the size label, refers to the minimum required net weight per dozen Eggs.
Varieties
While some Eggs in the carton may look slightly larger or smaller than the rest, it is the total weight of the dozen Eggs that puts them in one of the following classes:
Size or Weight Class Minimum Net Weight per Dozen
Jumbo- 30 ounces
Extra Large- 27 ounces
Large- 24 ounces
Medium- 21 ounces
Small- 18 ounces
Peewee- 15 ounces