I agree. I think Sapphire was around 4 or 5 MAYBE because he was around 5" when he arrived but still looked like a young teenager.. you can't believe what went on when he finally announced hay I'm a boy 🤣If your tortoise is four inches he is not a year old; he is closer to three or four. Same goes as to his sex; you would not at all be able to distinguish at that age. Did you perhaps get him at a chain pet store? It is common for them to not know or misrepresent their age. It would also mean they sold you some things you didn't need and/or an enclosure that is way too small. I encourage you to browse the Russian subforum and read the care sheet pinned to the top.