How to increase logo image size

You can put some custom CSS under the “Design” tab, as follows:

.logo img {
width: 500px;
}

Just put however big you want the logo after width (in this case I put 500px).

Any logo size is accepted. you can upload your bigger logo size:

or you can do by adding

.logo img{
 width:200px;
}

in custom css textarea.
you can change the value to anything you like.

thanks