Changing Icon Sizes


I have a button bar fixed to the bottom of my home page, however the (social media) icons are very small. I am trying to make them larger. Here is my code. Any helpful ideas?

<div class="button-bar">
            <button class="button ion-social-facebook button-clear" style="color:#FFF" ></button>
            <button class="button ion-social-twitter button-clear" style="color:#FFF"></button>
            <button class="button ion-social-instagram button-clear" style="color:#FFF"></button>


Please view the documentation for icon buttons:

Specifically the icon and button-icon classes.