Hi Alan-
By default in the Westview theme, the minimum size for the logo is 120px wide. You can make it smaller with a little bit of Custom CSS, however.
Navigate to Customize > Advanced > Custom JS & CSS and paste the following code into your Custom Theme CSS
.logo-site-title img { width: 50px; }
You can modify the 50px value until you’ve got it the size you’d like it to be.