It is kind of hard to say as snakes grow at different rates. It all depends on their genetics, diet, and environment. From personal experience, a hatchling tends to be around 7g or so (sometimes more, sometimes less). Subadults, are usually around 100-200g and full grown adults can be 400g and up. My 6 year old female is around 550g and she's not a large corn by any means.