Help? Need Measurement on a 1940 rear fender please!

My new project is a '40 coupe.  The rear fenders apparently had substantial rot damage and prior owner welded new metal, but did not complete the wheel wells.  I'd like to save these fenders.  If I had the piece of metal cut off as depicted in the attached photo (taken by prior owner), I'd have a better idea of how to complete the wheel well openings, but I don't have that piece.  Would someone be willing to take a measurement of total width of wheel opening (along the bottom edge) - it won't be precise given the curvature of the well terminations - a photo with the tape measure in place at both ends of the wheel opening showing the two points from which the measurement was taken would be ideal.  Thanks much, Douglas