Hello Bernardo,
Thank you so much for your question. There is no options to make the image size bigger than the current size. In this case, you have to write some custom CSS for it. We developed the theme logo which is suitable in the theme, but if you need to add bigger logo, please do it with CSS code. If you are not able to do it, please post your URL here, we will provide you the CSS code.
Best Regards,
Acme Supports