Hi,

Your current logo size is fine. You see it small because you have much white space around your logo image.

I've cut help you that white space - please download the logo image from my attach and replace with your current logo.

If you want to get your logo bigger, you can add more this code to Customize > Custom CSS:

#navigation.header-6 #logo img, .is-sticky #navigation.header-6 #logo img{ padding: 2px 0; }

Best Regards,

PenciDesign