Helja Granitasker, "The Armored Dragon of Tyr Faerath", Spell Casting Pose.
This is Helja Granitasker, one of my characters from Dungeons & Dragons. You might be thinking (Hey! "Dracomancer" isn't a D&D class!) Well, she's actually a 4e sorceress with the Dragonic Bloodline class feature and Armor Proficiency feats, but this information is a little too niche for a sculpture title.
This is the 1:72 scale version, a perfectly popular scale on its own, but also works for GURPS games on 1/2 inch hex grids (1yrd hex -> 1/2inch hex = 1:72 scale) and should work fine for 20-23mm minis. If, for some reason, you wish to include a Dwarven Dracomancer in your model train set, I think it would kind of work for OO or HO.
Photos depict 1:54 scale version. 1:36 and 1:72 are also available.