Some products are just too detailed for one small image to cut it!  Depending on your trade, you may benefit from allowing your customers to zoom in to the finer levels of detail when viewing your products.  Once this has been installed for your site you'll be able to upload large images, and customers will be able to zoom in on the most important details of your products.

Prostores most recently added image resizing functionality, so that all you have to do is upload a single large image. Prostores resizes the image to a thumbnail and a medium, product-list rendering. With "Product Zoom", customers can examine all 4 product images with a fine-toothed comb so they are certain of a products quality and craftsmanship