They vary very much in weight but I would say round about the 20g mark. I have 2 clutch mates who hatched the same day. They are now 8 weeks and one weighs 26g and the other 16g and yet they are the same age, same parents and same husbandry. Neither are too fat or too thin - just one bigger (length) than the other.
You are doing well with taming them - at that age they often go mental at humans.