Signatures (specifically mine)

I was just wondering the limits on signatures. Mine contains 5 pictures (4 50px X 50px and one 250px X 204 px), they are all hosted for free at imageshack.us. Is there anything wrong/unallowed pertaining to my case?

There is a limit on [img] tags, But I'm not sure what it is...

And as for size in general, 500 pixels is the max height you can have.

There is a floated topic in the open disscusion forum called sig limits or something. I recomend you check it out.

EDIT:
click me
I was bored. :P