Wow...
apparently mine is a little bit smaller...
And Ivenbach's Barbarian is a little bit bigger around the base. Maybe he should go on diet for some months.
TMU to answer your question, I used the sandstone material because on the shapeways photos it didn't look that bad. Those photos were maybe made with bigger models. So for anybody here, sandstone is no-no-no. Rather ask Thantos he has a decent printer with decent material.
No but serious,
I use the bases to make the models more compatible. All my heroquest Barbarians have a magnet base glued under. Same for the Elf. I did not yet decide for the wizard, he could be a bit smaller and it would be ok.
Mentor is used without base.
Modern miniatures (which are usually bigger) get a magnet inlay in the base so that they stay at their size.
And small miniatures come on those mini transparent bases i have.
I even think about introducing a yet smaller base for snotlings and rats and the like, to be able to fit several in one square.
First i wanted to remove all the transparent bases and replace them by Thantos bases, but then I was seeing how nicely that makes the dwarf or the goblin smaller than the others.