Best photos for Precut Rounds

Our store currently has 3 sizes of precut circles.
What type of picture is best for round images?
The best photo for any precut round is a photo or logo with white background. Any will work as long as its not too small. Smaller than 1.5 inches will be too grainy.
Sample of precut image with white background
Will you crop pictures for the circle image?
Yes, we crop it into a full circle. However, if your subject is not centered it will be difficult to do this (example A). You will have to submit another photo or the entire photo will be placed into the precut circle. This is ok but white area will show as in Example B.
Example A                                             Example B
A centered photo is important and your photo should be square and proportionate shape. Long rectangular pictures are difficult to crop into a circle.