KathyAire

I'm putting binding on oval placemats. It is eating my lunch. I cut the strips on the bias. I sort of understand how to connect the ends. My problem is calculating how much tail to cut off. I'm sure I'm not saying it correctly. On regular binding, if the binding is 2½" wide, I cut the tail 2½" past the correcting piece. But how do I do it on the oval mat when the ends are cut on the diagonal, how much do I overlap?
Hope someone can figure out what my question is. ☺

Thanks,
Kathy