Of my four southern holdbacks - the two that are definitely male are larger than the two that are probably female.

Over thanksgiving - I checked on the four I giftet to my little brothers. His are smaller than mine, even though they are from the same clutch. I suspect he isn't being as faithful with the reptivite and reptical as he should be, and I talked to my parents about that - to make sure he was dusting every 2 or 3 feedings.

Anyway - the largest one had pink dots on the vent where hemipenises would be - I'll have to check again in spring when they are bigger, but I suspect he has 1.3 (the other 3 didn't have any signs, but they may just be too small).

There definitely is a size difference between males and females of the same age - wether there is a relative tail length different with unbroken tails, that I am not convinced of.
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3.3 L. getula californiae
1.0 L. getula nigrita
1.0 Boa constrictor constrictor (suriname, fostering/rescue)
2.1.2 Elgaria multicarinata multicarinata