I was following the instructions here and added the php code and the css code but haven’t been able to change the size of the gravatar that was on the entry meta. I believe it was set to 25px by 25px for height and width on the CSS, I tried to change it to lower numbers but nothing changed.
oh wow it worked! Not sure what happened, I did make some other changes to the header and removed the logo etc from that, but seems to look fine now! Thanks!