Increase Logo in Header

I am trying to make my logo larger but it seems no matter what CSS I create or change that it move the menu over or the content down but doesn’t increase the size of the logo. The logo is huge but is restricted to a tiny size. If you look at the header code below…you will see a container in the header, there is the logo, then an UL for the site navigation, and also a toggle button. I believe the logo is the section navbar-brand-wrap but I cannot seem to figure out how to make it bigger. Any help would be awesome!

<header id=”header” <?php echo ( $home_layout == ‘home_enable’ ? ‘class=”navbar navbar-static-top” data-spy=”affix” data-offset-top=”68″‘ : ‘class=”navbar navbar-static-top static-menu”‘ ) ?> >
<div class=”container”>
<div class=”navbar-header”>
<button type=”button” class=”navbar-toggle collapsed” data-toggle=”collapse” data-target=”.site-navigation .navbar-left”><span class=”sr-only”>Toggle Menu</span><i class=”fa fa-bars”></i></button>

<div class=”navbar-brand-wrap”>
<?php zt_logo(); ?>
</div>
</div>
<nav class=”site-navigation”>

<ul class=”nav navbar-nav navbar-right collapse navbar-collapse”>