Changing the size of an integrated plugin on a "Page"

I have an integrated plugin for my tour bookings and need to change the size as it is currently taking the user 2 steps to start the booking process when it should only take one step.

The company tells me it needs to be 1440 px wide ( no smaller than 785 px) and the height set to 100%.

I thought maybe the answer was to create a new page template for this page to use but I’m not sure how to add these dimensions in.

Here is a link to the page in question:
https://bostonharbordistillery.com/pages/tours-events

When you click Book Now it should look like the below screenshot:

Figured it out…don’t know how to delete this post