I have a question about making form fields in Word and am not sure if this is the correct place to post.

I have a document that I want to add Text Form Fields to for a user to tab through and fill in, but cannot change the length.

EXAMPLE:

This agreement made and entered into this __________ day of ___________, 20__, between

Where the bold part is the fill in, but the line that is being filled in cannot change.

Can someone please help? Thanks so much!