<P> 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 . </P> <P> The following egg masses including shell have been calculated on the basis of the USDA sizing: </P> <Table> Modern Sizes (USA) <Tr> <Th> Size </Th> <Th_colspan="2"> Minimum mass per egg </Th> <Th> Cooking Yield (Volume) </Th> </Tr> <Tr> <Th> Jumbo </Th> <Td> 70.9 g </Td> <Td> 2.5 oz . </Td> <Td> </Td> </Tr> <Tr> <Th> Very Large or Extra-Large (XL) </Th> <Td> 63.8 g </Td> <Td> 2.25 oz . </Td> <Td> 56 ml (4 tbsp) </Td> </Tr> <Tr> <Th> Large (L) </Th> <Td> 56.7 g </Td> <Td> 2 oz . </Td> <Td> 46 ml (3.25 tbsp) </Td> </Tr> <Tr> <Th> Medium (M) </Th> <Td> 49.6 g </Td> <Td> 1.75 oz . </Td> <Td> 43 ml (3 tbsp) </Td> </Tr> <Tr> <Th> Small (S) </Th> <Td> 42.5 g </Td> <Td> 1.5 oz . </Td> <Td> </Td> </Tr> <Tr> <Th> Peewee </Th> <Td> 35.4 g </Td> <Td> 1.25 oz . </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Size </Th> <Th_colspan="2"> Minimum mass per egg </Th> <Th> Cooking Yield (Volume) </Th> </Tr>

How many different sizes of eggs does the usda have