The sizing of the book was estimated based on four points:
- Photos of someone holding the original prop (comparing their hand size, etc to the book)
- Photos of the original prop with a hand written note on what looks like standard sized paper
- Measurements of a back-up Auryn prop from an auction compared with the Auryn on the original prop book
- Standard paper sizes compared to the original prop book
Amazingly all the above photogrammetry matched up extremely close, so we're pretty confident about our sizing (which is smaller than what was previously estimated). This also confirmed my assumption that the Auryn medallion and the one on the book cover are the same size.