The size of tulwar handles was always a topic of discussions. The idea that the tight fit gave the warrior a certain jolt of aggressiveness ("josh") as per E. Jaiwant Paul ("By my sword and shield") always amused me: people all over the world got physically bigger after their nutritional status got better. Modern Japanese teenager is about 15-20 cm (10-12") taller than his counterpart from 1930s. I have a Pata and cannot stick my hand into the gauntlet at all.
I just got back from England and at Leeds Armoury here are plenty of complete sets of knights' armour. Some would fit a 6 footer, but most were built for a 5'2"- 5'7" man. Every time somebody complains about McDonalds, remember that Lancelot might have easily been a runt and Indian heroes just midgets