Yoshi is cute. Congrats on the new addition. Santa was good this year.
It is so hard to judge age just by length. I have 3 hatchlings that I kept this year. 2 are clutch mates but they were that big by 4-5 months and the last one, not related to these, is much smaller. So between genetics and feeding schedule it is impossible to give an exact birth month with out finding out from the breeder. But I know with both my big babies. Their parents were fast growers too.