I found the actual button design guidelines, and noticed that their launch partners (FitBit and The Fancy) have designed their own buttons in the same style as

I found the actual button design guidelines, and noticed that their launch partners (FitBit and The Fancy) have designed their own buttons in the same style as Google's JS buttons. Here are the design guidelines, PSDs, and PNGs: https://developers.google.com/+/branding-guidelines https://developers.google.com/+/branding-guidelines