Hello,
The map size is automatically adjusted depending on the device size and the available area in your page, but you can manually adjust the size as you wish to fit in your website page by editing the height values of the #mapbase svg in the plugin file map-style.css
Note: once you save changes, you will need to clear the cache files (Ctrl+F5) to see the effect.
If you have any question about the Premium US Map with states, please consider using the contact form here so we can verify your purchase and be able to provide further assistance.
Kind regards
wpmapplugins.com
Support Team