WordPress recently added the Custom Logo feature which is pretty neat. Storefront 2.0 also added support for this recently. By default, Storefront will set the logo to be 110 by 470 – which is pretty small. If you want to make that bigger, you just need to override the theme function using something like this.
Make sure you remove the opening
php tag if that’s already in your
functions.php file, and change the values of
400 to whatever you want.