Slither is 29cm long and was 13g when we got her. She's now up to 17g after a good feeding. (2 pinkies).
She's probably 3-4 years old and will max out at well under a meter.
I'm keeping her in a glass tank with birch shavings, a hide and a bath. Although she seems to prefer to be buried in the shavings.
https://ball-pythons.net/gallery/fil.../DSCN6431x.jpg
https://ball-pythons.net/gallery/fil.../DSCN6413x.jpg
https://ball-pythons.net/gallery/fil.../DSCN6399x.jpg
https://ball-pythons.net/gallery/fil.../DSCN6393x.jpg