Frilled Dragon Breeding

Hello.
I've been reading a ton of care sheets and breeding information regarding frilled lizards the last year, but can't seem to find any information as for how big a female should be before being subjected to breeding. My female is around 2 years old right now, but I feel that she's still to small, which is why I'm waiting to introduce her to my male at least another year.

I would love to hear what other people thoughts are and what size/weight your females were before being introduced to breeding.