At the moment we have codes in sizes 50x50 and 88x31. Direct link at your own risk :)
You can copy and paste the HTML onto your webpage. Add the URL for the code where it says "CODE-URL-HERE", else the button won't show.
If you don't like my codes and have made your own, how about donating it here for others to use? I will give credit for it, of course. Want to donate something?