i did read them... and all it says is

7. Pictures in sigs must be 500x100 pixels or less. Anything bigger will be removed. Please do not include any type of spolier within your sig picture or text doing so will get the sig removed.

Which does not say that they must be 100kb or less... now the avatar does say 100kb or less... but thats alright, ill keep the sig to lower the 100. If i am wrong and the 100kb is posted for sig's pls tell me where because i did look. Thx