That is a signature. Go to settings (top right corner) -> edit signature (left side)
But to get a picture (SigPic) in the signature you can contact someone who makes them for you:
http://forum.supercell.net/showthrea...aphic-Services
- Chose one of the Signature services
- Reply a post that contains all the details how and what should be on the Picture
- Wait 2-9 days (depending on how busy they are) and I would recommend telling them in this post that they could message you the Signature picture once they are done
Then once you have the pic go to edit signature upload the picture in there, and below you can write your stats you would like