Half.com Policies - Image Policy
Half.com gives sellers listing in categories other than Books, Music, Movies and Games the option to include graphics or images to better describe their item. Listings may only include graphics or pictures that describe your item for sale and may not include promotional or non-item related graphics.
GIF or JPEG (aka JPG) files may be uploaded. Animated GIF files are prohibited. Your image file size must be 2MB or smaller and we reserve the right to resize it, convert it, or to change it as we see fit in order to save file system space.