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Chicken eggs are graded by size, for the purpose of sales.
Contents
The egg shell constitutes about 13% of the weight of the egg.
United States of America
The United States Department of Agriculture sizing is based by weight per dozen. The most common U.S. size of chicken egg is 'Large' and is the egg size commonly referred to for recipes.
The following egg masses including shell have been calculated on the basis of the USDA sizing:
Canada
In Canada, modern egg sizes are defined as follows:
Europe
In Europe, modern egg sizes are defined as follows.
Australia
In Australia, the Australian Egg Corporation defines the following sizes in its labeling guide.
In Western Australia, two additional sizes are also standardized by the Golden Eggs Corporation
New Zealand
In New Zealand sizes are based on the minimum mass per egg: