Q&A for How to Wear a Kilt

If you mean the "fly plaid," the corner of the square is pinned to the upper left shoulder, and the rest is draped over the shoulder and allowed to just hang down the back.

An appropriate length is just above or just below the knee - not too far up or down, as the kilt is not a dress or a skirt.

How high or low on or above your hips is up to you, as long as the bottom hem is just above or just below the knee.

Buy a prop, or just don't carry one.