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.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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.
To change the width of a specific field, open your form in the form designer:
Then click on the "CSS" tab in the designer. After that, double click in the field you wish to change, then click on "Width" in the CSS tab. Change it to whatever you like and it will only change the specific field:
As for the phone field, in the settings for the field there is an option for "Input Mask":
Set that to enabled and it will only accept numbers.
Let us know if you have any further questions and we will be happy to help.