First, you must have sharebar plugin in your wordpress blog, from wordpress left panel, click menu Setting — Sharebar, then click Add New Button.
Go to http://www.google.com/intl/en/webmasters/+1/button/index.html to get Google +1 code, because sharebar support two type button, small and tall, click small radio button and copy this code, then click tall radio button and copy this code.
Back to your sharebar Add New Button,
- Name : your button name (like plusone)
- Position : your button position in sharebar
- Enabled? : tick this to enable your Google +1 button
- Big Button : fill with the code you get from Google (in google Tall (60px) radio button, see above), or use this code:
- Small Button :
Klik Add Button to add Google +1 button in Sharebar. Now from sharebar available button, you can see Google +1. And now when you view your post or page in your blog, you can see Google +1