message box huge

Hi
Is there an EASY way to make the text box smaller (it is huge) for contact 7?

I already broke my site and had it restored (it isnt working so well now so I am pretty nervous about doing that again)
I tried to change in the editor.

I have read all the forum posts on it and don’t understand any of it.

Can we do it easily thru the settings page?

Or if it isnt easy, are there any suggestions for a different form with a captcha?
Thanks Mary

http://wordpress.org/extend/plugins/contact-form-7/