Hey i have been here a while now and i never found out what the largest size for a sig was. If someon would tell me i would really appreciate it.
You can make them really big, but sometimes it is not the best choice. For dial up users it makes page loads slow. Sometimes it is hard to fill up such a big space too. But it is up to you. Most people seem to do from 300 to 500 pixels in width and 100 to 200 pixels in height.
Exactly what coke says, your signature could be 1000x1000 or even 10x10 for all anyone cares, whatever you put in your signature box is your signature. Biggest would be watever you can fit..
sigs stands for signature and i dont think there has ever been a regular size. I mean people just have adapted to the small size bc its easy to make. Making a large piece could take hours as a sig can take 15min-2hours