
I
did a detailed analysis of what image dimensions are supported by
Google+ for Profile Pic and scrapbook thumbnail images. Unfortunately
the maximum image size supported by Google Plus is comparatively much
smaller to Facebook which is 540px by 180px. The maximum profile image
resolution in Google+ is 202px by 192px. This is my mere approximation
and I can be wrong by 1 pixel more or less but as far as I could
calculate the image dimensions using Photoshop, this was what I
observed. So If you wish to use a clear cut image of yourself or your
brand or product then make sure that you keep these image details in
mind
Following image formats are supported:
- PNG
- GIF
- JPEG
Following are some Image Size Details:
- Profile Picture: Maximum Width = 202px & Maximum Height = 192px
- Scrapbook Photo size: Maximum Width = 126px & Maximum Height = 126px
What are Scrapbook Photos?
Just
like your profile photo which appears to the left of your profile, your
scrapbook photos are small thumbnail images that appear as featured
images on the top of your profile just below your name. See the
following picture to get an idea

You will be interested to know how I created that photo stream just like
Facebook Photo Stream.
I will share a detailed post on my next tutorial so make sure you
subscribe and do not miss any trick on Google Plus. Have Fun! :)