[@Willy Vereb]
Magic and rough size, yes? okay, let me think...

In terms of magic: We need to have a regulated system of magic, something that is widely accepted. as with dragons, magic creatures should be rare and elusive, so they don't dominate the battlefield. Battlemages should have very limited powers, such as throwing small fireballs or bolts of lightning with higher ranking mages able to take out small groups. Anti-magic, or resistance to magic, is also acceptable. Considering what few battles should take place - war is probably going to be highly uncommon - consulting the sides who are taking place in the battle is advised.

Magic outside of combat - Healing mortal wounds, curing deadly poisons and recovering from disease will require a lot of effort, focus and energy, probably only one or two very adept mages could cast them. Smaller things, like curing minor injuries or nettle stings, shouldn't require too much effort. I will have to object to Illusion-style spells unless the receiving party is comfortable with such a spell being cast

In terms of size: Europe is roughly 10,180,000 km², whilst Asia is roughly 44,579,000 km² in terms of Area. I see our nation as being more Oceanic than European or Asian - roughly 8,525,989 km².

In terms of area, our continent is around 10,000,000 km². Not sure how that fits into population density, however.