When I looked at it, the pic. was not big, but when I saw the bytes, I thought WOW! According to your dimensions, it was humongous!
Okay, I think I know why it wasn't so big for you. In your Internet settings, I bet you have "this" (the picture below, where the red arrow is pointing) checked. If you do, it 'sizes down' the pictures that are larger than your IE window, but there should be a little 'handle' thingie in one of the corners that you can click on, and it will show the picture at full size. I don't like Internet Explorer determining what size I view my pics! But that's just me. LOL I always leave this option UNchecked.