WordPress Themes. Trying to figure something out on this theme. Help?

Anyone ever use this theme? Or knows what I need?

I need to change the logo size to make it larger, but cannot figure out where to do this. I have review the code a bit, and though I haven’tt done this in a long time, I have a general idea of what to look for. I guess I’m looking for the wrong things. Any assistance would be appreciated.