iphoto photo enlarges itself in Print

I editted a photo in iphoto and was ready to print it. But when I clicked on Print, the preview picture it showed me was not the same thing. It appeared that the photo had zoomed in on itself, so that it was enlarged and much of the photo no longer visible. I went back to edit in iphoto, and the correct image was still there. But whenever I try to print it, iphoto enlarges it excessively.