A knight would wear a suit of amour to protect his body in wars or jousting. His props were a steel sword and shield, to also protect his body
Armor. A knight in shining ARMOR.
proably where movie props are sold, but if your willing to spend millions you might regret buying it.
A dress
the batsuit, he wear the batsuit in all the batman movies
They wear suits of armor.
normal clothes
to protect itself.
A breast plate.
chainmail armor helmet chest plate gauntlets footwear
To protect themselves from getting hurt.
I believe movie specialty stores online would have them. And if you are on a plane anytime soon and they have the sky mall magazine you can find a dark knight section with many copies of some of the props
Ladies would give a knight something to carry into a joust. Typically this was a scarf.