I create newsletters with a Hubspot template and in desktop we have six photos total, with a big header at the top, two pictures below that are smaller and three pictures below that that are smaller. Here's an example of the most recent newsletter: https://app.hubspot.com/email/3826647/edit-beta/8098369358/content
I am, however, hoping in mobile to make it so all six pictures are the same size. They end up being different sizes and it's not very aesthetically pleasing in mobile.
I contacted IT and they said to ask about a media query?