Google plus Updates and Added three new Option that will change look of whole google plus Profile.You can now add google plus cover photos in your google plus business page as well as profile.
Size of Google Plus Cover Photo
Size of Google plus Cover photo is 940px X 180px
Google Plus Profile Photo Size
Size of Google plus profile photo is 250px X 250px
Google Plus Cover Tiles Size
Size of Google plus Cover tiles Size is 110px X 110px.