Signature help

[Estsound 7]

So i've been around here for a while, and some people have those massive signatures, it says that maximum signature size is 200x1000, so i tried to add signature, but i can't. Its 310x100 or something like that, but cant add it. So how can i do it ? I just dont get this people have huge sigs.

[Aaron Clinton 2,372]

Some of the staff or people with over 1000 posts might have higher limits, but the rest of the board has the same restrictions. Shoot me a PM later if you still need help.