For the SIG size............................
check down near the bottom....there is a line with Contact-JREF-MOD-Archive-(and there is a "Forum Rules " section) with the section that tells about SIG SIZE. As for the avatar , I think it is 100 by 100 Pixels or 97.7 KB , which ever is smaller, but I am not positive on that? I think a donator gets a 120 by 120. Since I have joined , things have changed now and then. Maybe another admin can tell you for certain.
Uncle Frank
:?