Is there a way to make the Embed or Code Block larger?

Hello, I don't know anything about how CSS code works at all.  I've gotten a code from a platform that I want to promote on my squarespace website.   When I insert the code into an embed block, it only gives me a small snippet.  I want it to be much larger on my website page.  I've attached an example, i've circled the area of the snippet.  I want this block to be a larger size on the page. 

Can you share link to this page? We can check easier

https://www.kevinjohnsonvisuals.com/contact

Edit your Embed Block > Change height: 100%; to height: 600px;