JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
Try adding this code to your form:
min-width : 600px !important;
Adjust the value to your liking.
Here is my test form with the code added:
If the width was not what you were looking to change, let us know specifically what you would like to look different and we will be happy to help.