I feel like she isn't full grown (even though chameleons never actually stop growing) but because she still has her tan and hasn't fully greened up by the look of the pictures
No size scale is visible, but based on the size of the hand in the photo she looks to me like she's roughly 6-7" long (3-3.5" svl). I'd expect a female to reach that size somewhere around 6-8 months old, under good growth conditions. This is about the size and age that they start to reproduce in nature (or as feral animals here in Hawaii) but she's far from done growing. Again, under good growth conditions she'll reach maybe 9" at a year old and perhaps 12" by two years old.
Agreed, that's a female T. jacksonii xantholophus.