I want to include a "google+1" button on a page, yet I want to use a custom image with a custom size for it and preferably without javascript, much like is possible to do with Facebook and Twitter. I don't care if it don't show the count number for now.
Finally! Found a nice solution to this problem. So simple and working :) Hope it helps you!
<a href="https://plus.google.com/share?url=ADD_YOUR_URL" >
<img src="path_to_your_image" alt="Google+" title="Google+"/>
</a>
Source: http://notesofgenius.com/how-develop-custom-google-plus-button/