From the web presentation point of view, I would keep the thumbnail pictures the same size concentrating on the best part of the picture. They can click on the thumbnail to see the whole picture.

Also on the buy information page, I would put all the information on one page instead of making the viewer click on something to see the other half of the info. There is plenty of room on the page to view all of the info.

Good mottos when creating web pages are: KISS "Keep It Simple Stupid" and ASSUME "If you assume anything you make an ASS of U and ME".