After looking through approximately 200 web pages, the following seems to apply to bullet size in general: Bullet image size: Width X Height=30 pixels X 30 pixels
However, I've encountered some bullets that has size greater than 30 pixels in either width or height. In addition, I've also found some sites that contain ambiguous bullets, images that do not resemble the regular bullet shape but seem to be used as bullets (such as arrows, spinning star, spinning globe, etc...)
They are mostly found in lists and with a single line text such point form content and as headings. For example, in a list of links, each link would start with a bullet.
Last Modified: September 30, 1999