H16 Mast step. Measurement of stops?

I'm checking the wear of the stops on the base. Can someone take a measurement of a new base, stop to stop, at the widest point to give a reference to my old one? A plan view perspective, looking down on it, would work.

You mean like this?

1-3/8" inside edge to inside edge, 1-3/4" outside edge to outside edge.

I guarantee your mast step doesn't look like that unless your boat is less than 10 years old.