Ok. If I right click on an image, or even someone's siggy, then on Properties, it will show dimension pixel xx x xx, and size in bytes.

Since siggys here don't have to be exactly 125 x 600 or less in each dimesion direction, how do you figure it out, if for example the one that is 400 x 400??? If I "take" 200 from the 600 to make 400 then can I add that 200 to the 125 making 325 and therefore it is within the parameters? IDK.

Then, where does the 35k come in? I haven't seen that on most pics, is it a designation for other types of pics, comes in thousand's? (Of what?)

My siggy is 7142 bytes. 109 x 93 pixels. Obviously it's small enough, but I only really know this because each of the pixel #s is smaller than the correspoinding parameter suggestion.

I really think someone who understands all this could explain it to me quite simply.