Hello Monica,
There are 2 kind of limits for form fields:
1) System limits :
A single line text is limited to 100 characters (if the subimetter enters a text that exceed that limit the text is recorded but ELQ only displays the first 100 characters)
Paragraph / large text field is 32,000 characters
2) Contact record visibility :
Only the first 100 characters are displayed on the contact record (even for large text field, report has to be created to acess all the data).
Have a nice day,
Marie