Image Sizing with and w/o link

Im noticing a strange behavior with inserting images into my blog. I recently got rid of the links for the images that allowed users to click on a picture to open it a new screen because I didnt like how when you highlighted over the picture the image highlighted red and seemed to pop out at you. However – when I do that, I notice that the image displayed shrinks in size significantly. Add the link back and sure enough the picture shows at the normal size again. I’ve tried just about everything to resize a non-linked picture but havent had any luck. Any ideas?

In the page I listed above if you scroll down to the packet capture images I changed one of them to be a clickable link to show how the image displays at the correct size on the blog page compared to the others around it. Search for the text “IP does for TTL – decrementing it at each hop” and its the image directly below it that Im talking about.

The page I need help with: [log in to see the link]