NERD, and probably others are breeding small water monitors. My Jewel is now 2 years old. She is not much bigger then a female Argus Monitor.
(Sorry about the wierd selfie, but she was on my head) she is a 4th generation NERD captive bred monitor and about 1/4 the size i thought she would be. Even if she doubles her size, she will still be small enough to easily keep indoors in a large enclosurs. ( im still planning a room for her habitat, but it will be huge) I just thought i would mention how small she is, in case anyone has been dreaming of a water monitor, but doesn’t have room for a huge lizard in their home.