What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
You can inject this custom css code to enlarge the product images:
If you wish a different size, all you need to do is change the value of the width:150px !important; from the code above.
Here's a guide on how to inject a css code: How to Inject Custom CSS Codes
You can also check out this clone of your form where I applied the css code: https://form.jotform.com/60071724040947
Do inform us if you need further assistance,