Embedded form size

I have added themes to my forms.  When I place them on Squarespace the size is restricted on my site.  When I preview in Jot Forms edit mode,they look correct.  How do I get the size to appear how it does in job forms preview.  Is there a setting I should be using on my Square space?

Thank you.

Thank you for contacting us.

Are you referring to the form horizontal width on your website, or something else?

We are looking forward to hearing back from you.