There’s a great thread of costumes on Craftster, which is where I found this Princess Zelda’s Magic Armor. bold_as_love made the armor for a friend and says:

The whole thing was made with craft foam, gold spray paint, jewels, and closes in the back with a gold chain so that it can be more fitted to the wearer. I use this tuttorial http://www.entropyhouse.com/penwiper/costumes/helmsdeep.html. Which was amazing, althouhg I did skip a few steps.

• Princess Zelda’s Magic Armor