Eclipse' sig is 319x119... it's not overly large, I have made
smaller ones and much
larger ones. Width doesn't bother me too much on sigs, though more than 600 wide causes problems for some people on low rez... the height is the big thing, I think 250 is that max height a sig should be, it's just too distracting otherwise.
I like sigs a lot, they are neat to look at and show some of the personality of the poster.. but if you want to set a restriction (probably a good idea) 450x200 would probably work.
