To increase the size of icons relative to its container, use icon-large, icon-2x, icon-3x, or icon-4x.

Increase the icon size by using the icon-large (33% increase), icon-2x, icon-3x, or icon-4x classes.

icon-camera-retro

icon-camera-retro

icon-camera-retro

icon-camera-retro

{% highlight html linenos %}

icon-camera-retro

icon-camera-retro

icon-camera-retro

icon-camera-retro

{% endhighlight %}
If your icons are getting chopped off on top and bottom, make sure you have sufficient line-height.