What is normal? If you're a predator's size, which is way over 6'5", then a 1:1 sized mask will be appropriate for you. If not then you're going to look like a bobble head. Bobble heads are not cool. You should be trying to make your gear based on the scale size of your body, not something that is 20% bigger than you. (People make the hands, feet, armour and such based on their body size, why not do the bio as well?).
The mysteria P1 bio is supposed to be smaller...