Cycle through each imagine in sheet and change it's height / width ignoring one image?

[Hyflex]

Anyone know how do the following:

Cycle through every image on a sheet without knowing their picture name OR cycle through Picture 2 to Picture 50 ignoring any what don't exist?

And then setting their width and height to the following:
Selection.ShapeRange.Height = 70.8661417323
Selection.ShapeRange.Width = 87.874015748

Thanks in advance
- Hyflex