automatic resizing of "picture in cell" images

First off, I am an amateur when it comes to excel.

I am organizing my postage stamp collection on excel and have thousands of images that correspond to each individual stamp. I initially tried hyperlinking each image, but found that they get all mixed up, or lost all together. I am not good at formula's, but found some online, but could not get them to work. My best success (so far) has been using the "place in cell" function, and my question is this: how can I permanently make the image larger when using ctrl+shift+F5?