high quality JPG: 88k
low quality JPG: 27k
16-color GIF: 72k
256-color GIF: 203k
low quality JPG: 21k
high quality JPG: 52k
web palette GIF: 15k
What does this all mean?
JPEG format is great for photographic images, while GIF format
is better for those that look "cartoony," or those that have a few
number of solid colors.
Use Photoshop's Save for Web... command to test which
optimization technique is best for your graphics.