Why can't we insert larger images on the Thank You page?

Hi Darcie,

Thanks for reaching out to us for help. Unfortunately, the current 90px space for images on the Thank You page was a design decision. Back in the day, we needed some sort of limit and we put 90 pixels. While the feature you’re looking for isn’t currently available, rest assured we’re always working to add new services and features to Jotform. 

I've gone ahead and escalated this to our Developer Team. When or if it's developed depends on their workload, how viable it is, and how many other users request it. If there are any updates, we’ll circle back to this thread and let you know.

Reach out again if you need any other help.