Hi Jayne,

You can make these a little bigger if you want and don't compress them too much. The photo you uploaded was about 300 x 327 and is about 26k in file size. You can do something bigger like 600 x 500 and a file size of 50k or so. That way the photo is a little bigger and better quality. If you create the file as a .jpg and use about 70% to 80% compression you should be fine.