How do I make the "larger image" pop up at its real size?

How so I make the "larger image" size for each product pop up at its actual size rather than the smaller size that the browser originally sees. I have each image in the shopping cart sized to 800 x 800 pixels, so I don't think this will be too difficult, but I can't find where to do it.

When a viewer clicks on "View Larger Image," a little window pops up in the browser and then, after a few seconds, resizes itself to the actual size of the image. How can I make it open up to the actual size and not "hang" there in the smaller size? Can Image Handler 2 make that happen or is there some other way of doing it/

What size is the larger image?

bigbadboy:

What size is the larger image?

I've made all the images in the shopping cart to 800 x 800 pixels.