Report Size Comparison chart in Mythras Posted September 4, 2017 Well, there's the Comparative Weights table on page 224 of Mythras, but SIZ on creatures gets a little odd. It's not as easy as just grabbing a chart and saying "SIZ 1 = mouse", or something like that, as SIZ interacts differently with the overall frame and build of the creature. For example, if we look at humans, an infant might start at SIZ 2, a toddler SIZ 3, and children moving slowly up in SIZ until they hit adult SIZ in their late teens. A Basalisk is described at the size of a "large rooster", and has an average SIZ of 5. I would say look for creatures with a frame and build close to an existing creature, and benchmark from there.