3D model of the new Pokemon: Sun and Pokemon: Moon grass starter Rowlet
It's around 1.25" wide, so you may want to scale it up to make it a little bigger.
**7/24/16--Finally got around to putting up images of the 3D printed figure. I'll probably go back and change up the color a little bit though. This printed Rowlet was scaled up by 1:1.25.
I worked off one of the images Nintendo released off their website of Rowlet and the short video introducing the new starter Pokemon for Sun and Moon that can be found on Youtube.
In terms of scale, I came to this size estimate since it seemed around the scale of other small Pokemon figurines and seems like a relatively small Pokemon itself.