Smaller version can be found at http://www.clicktorelease.com/tmp/google-svg/image.svg which I found at https://www.quora.com/How-could-Googles-new-logo-be-only-305-bytes-while-its-old-logo-is-14-000-bytes#ld_bnfytn_155043
An even smaller version (458b) can be found at https://www.notehub.org/2015/9/8/google-logo-2015 however contains more than just the image.
