Is there an easy way to widen drawer holes for new wider pulls?

Rosie
by Rosie

I have an older chest of drawers. The old pulls are 3" wide from hole to hole. The new pulls are 3 and 1/4" wide from hole to hole. I know the new holes should be wider by 1/8th each left and right of the old holes. How can I be sure to get the holes drilled correctly?