There is no range and you should not go by weight, I have 2016 females anywhere from 400 grams to 1100 grams and there is only 2 to 3 months age difference between them.
They grow at different rates and there also other contributing factors between animals, size out of the egg, how fast the animal started to eat out of the egg, prey size, feeding frequency etc.
What matter is a healthy animal that is eating appropriate size prey and that is well proportionate.
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