Egg grading

Here is a good link that might help you out.
http://www.ams.usda.gov/howtobuy/eggs.htm

as for weight... these are approx from information that I have gathered

Jumbo eggs 2.5oz
Extra Large 2.25oz
Large 2.0 oz
Medium 1.75 oz.
Small 1.5 oz
Peewee 1.25oz

Hope this helps and is what you are looking for.
Tes

 

A small accurate scale is needed for sizing eggs for customers. Most people prefer uniformity in both size and color.
I sell eggs as either Medium or Large. If an egg is off-color or has some other cosmetic defect, it's not included.
It really does make a good impression when your customer opens a carton and sees a set of clean, fresh, uniform eggs. These impressed customers will be good advertisement for your eggs.

Good luck,
spot