What’s the reason for eggs to be sold in dozen

Question

What’s the reason for eggs to be sold in dozen

In: Other

Answer 1

They aren’t everywhere. In Serbia they are sold in packs of 10, 20 or 30. People tend to stick to traditional measurements because that’s how systems (packaging, transportation, shelf space etc) get built and it’s a pain to change after. 12 has many divisors so it was a useful count to have of many things bought in bulk, so likely that just got solidified with eggs.