Maybe use an eight by ten and a half inch on the placemats. It could depend on her size plates that she uses for company. Then the runner could be eight wide if you don't mind them being almost sid to side in the width. Since the width is short, you could make a table topper that would cover the whole top and that would be kinda easier on you.
If she lives close you could use paper cut outs to get a visual idea of how it would look finished and have her input.
Last edited by RedGarnet222; 03-21-2013 at 11:00 AM.