It is easy to add follow us buttons to blogger using AddThis widget. To do this first open AddThis website and click Get the Code tab. Now click on Follow Buttons tab
Choose the type of site you have and select Design as Horizontal Large Menu.
Now add url of your Facebook, Twitter, Google+ and and whatever social media profile you have as shown
After adding this Add This will automatically generate buttons for your website, just copy the generated code and paste it in your page between the <body> and </body> tags.