Adding Border to Product Images

[pastorhale]

I want to add a border to my product images, no matte where my images are (new products, product description, specials, side bar or main area, etc.). I didn't see this option in the admin configuration (but I can be mighty blind sometimes). I tried to add a general img style to my stylesheet but that, of course, added a border to EVERY img tag, and I want only my products to be affected. Thanks for all you can do!