Unless the seller has been keeping track of the number of molts, I don't think it's possible. There are sometimes variations in size from mantids of the same instar stage depending on who gets fed and what not. Mantids usually reach adult by the 6th or 7th molt and so for me, I would think 3rd or 4th instar would be about halfway through in terms of size.thanks for the answer
how can I ensure the seller is true? is it possible at all? is it related to the mantis size or not?
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