XF 1.2 Limit signature image size + completely remove the overflow option


I want to limit the signature image size but when I tried that:

.message .signature .bbCodeImage {
max-height: 100px;
max-width: 200px;
overflow-x: auto hidden;
overflow-y: auto hidden;

It shows the correct size, but still asking me to click for the larger image, when hover it. I want to have plain image with no option to enlarge it.

Any one got the knowledge?

Thanks :)