I have a project I would like to do and need some eggs. Size a, b or c doesn't matter as I don't have the slightest clue what it means. I haven't paid much attention to seramas other than to know that they carry the choc and dun genes, they are tiny, and eggs don't always ship well. I prefer a larger chicken as my project is going to be a larger chicken. I refuse to wait until I can afford the chocolate orps. It would probably take just as long anyways. I do know I have 2 serama eggs in my bator developing that were sent as extras. To bad they aren't chocolate.