These can not be sexed visually, I would not even consider a guess to be accurate at all. If CB then best to know the breeder and past history as to sex they produce currently if any have been endoscoped. If not then it's a crap shoot, probably good chance you have at least one female and male that's about the best guess. In a short time you can probably sex them visually around 11" the males will act up and things show. At current size you may see the penis on males when soaking, but that will be your most accurate way with out any of the above.