I\'m working on JSF, and I\'m using this code to display an error box.
You could override the framework CSS (I guess you're using one) and set the size as you want, like this:
.pnx-msg-icon pnx-icon-msg-warning {
width: 24px !important;
height: 24px !important;
}
The "!important" property will make sure your code has priority to the framework's code. Make sure you are overriding the correct property, I don't know how the framework is working, this is just an example of !important usage.