Best age to sex ?

[RepBex]

both my geckos are about 4 months old now and i think they are both females but at what age is it really easy to tell ?

they live together fine no fights or anything

 

[Mel&Keith]

Usually by 4 months males will have fairly obvious bulges. At 20g almost all Leos can be visually sexed.

 

[RepBex]

Thanks