Never one to shy from battle, macmac girds his loins and sallies forth into the fray...
Jen, I have the sense that maybe the word "size" is misleading in terms of how an image is displayed on your site. I agree that you wouldnt want to change the physical dimensions of your images; they fit your page perfectly. What the responders are referring to is file size. For instance, the cake below, on your web page, is about 1.33 mb, and takes a long while to download, even on superfast connections. With a simple graphics program, I reduced the size to about 3 kb with very little loss of quality.

macmac
thank you, you are the true web master, your response is very informative and it impress me. this time i might have to market for some good quality web design program and take your advise. I am not concern with my files right now and my images will stay the same size until i decide to use the "best" web design program. great answer, thanks again.