If I'm interested in making a sash out of a Wallace Dress Blue tartan for my lady, (yes, I know it's usually used for dances and rarely seen), and rather than a fully traditional sash, it has to be good for a Ren Fair, though I am open to a traditional sash if it's affordable. How much fabric would I need for a traditional sash, and what techniques or recommendations does the rabble have for sashes?