Google + user Paul Durban has posted to the public the exact pixels you need to crop your pictures to when tinkering around with your public Google + profile. So you can go ahead and do as Mashable says. He also provides a Photoshop template to do just that, but we use the GIMP… nevermind, thanks Paul!
By the way, love Google +. By partly starting from scratch and building your circles, you automatically keep it small and relevant. This alone makes us wanna come back for more. And besides, the way small and bigger privacy points are handled is pristine.

[...] Google has been quick to feature the 4-5 photo-art-wall thing that was introduced to facebook a while ago. [...]
By: Something new this way comes (Google+) « A phantom. A memory. on 27/08/2011
at 13:09