The Collector Series is a range of miniatures already painted by an artist.
The model is already painted and is as seen on the pictures. No modifications can be done.
For more information on the model itself, you can check the links provided to have scales

Model painted by Maxime Croteau -  https://www.instagram.com/madmaxminiature/

Model from DTR Studio

120mm from the bottom of the base to top of the head