Wow.....lots of good info here.
The cans and wills of this hobby sometimes outweigh the shoulds. Can a snake of a certain size breed, you bet they can, should they, probably not.
Although snakes in the wild are probably makin babies far before we would consider them "ready" there are a lot of different variables there too. Just like anything else some females mature far faster then others. Some will be ready by 12 months, however very far and few between. If you plan to breed anything, be it balls or corns, do your homework. Coming to the forum and asking questions is a great idea, however sometimes the question asked shows the majority that you are far to new to the hobby to be attempting certain things. Not saying you are new, just saying in general here.
Guess the final thing is, if you have to ask if shes ready, your not.