Hi Like,
When I make my runners, I usually make it the size of the pattern I am following..when I follow a pattern...lol. You can do a google search for quilted table runners, just see all the different sizes, then do an "average". Since the runner you're making is for moi, I would say you just make whatever you want, and I will love it! Matter of fact, shouldn't we all get a turn on the red carpet at some point in our lives??
Kif