I weigh my eggs on an electronic digital kitchen food scale that has the ability to weigh in both grams and ounces. I weigh them in ounces. I bought the scale 3 years ago on e-bay for $10. I think they're about $14 now for the same one. I use it for everything.
Of course, I'm not weighing eggs to sell or anything like that. We consume all our eggs or share them with family & friends, but that's it. We only get about a dozen eggs a week from our 2 girls that lay (4 freeloaders)... Bertha consistently lays her eggs between 1.9 and 2 ounces, and Lola's eggs have been consistently 2.2 ounces with the occasional 2.3 ouncer.