The dress can be as detailed as you wish, it all depends how much effort you want to put into the costume. Pastel pinks and purples look best for the top half of the dress which can be a shirt. This is hemmed into or simply tucked into an ankle length white skirt. Now comes the most recognizable aspect of the outfit.

The Triforce is always on the front of the dress as a banner.

Wear white tights.

Princess Zelda’s trademark golden shoulders can be replicated by making it yourself with foam, cardboard, and gold spray paint, or you can try finding it in a costume store as an accessory for costumes.

Find a golden tiara or at the very least a golden headband.

If you are able to find Triforce earrings, where them as she does.

Check out your local costume store for fake elf ears. These are vital for the outfit.

Do your hair the way Zelda does by braiding two parts on either side just before the ears. Have the rest of the hair loose.

Carry a (fake) sword.

Wear a pink cape.

Wear white shoes.