Resize multi-line text area in widget

I created a contact form, and one of the fields is a multi-line text box.
I can’t seem to find anywhere in the css file where I can resize it.

form.iwacontact ol.iwacontactform input.input { width: 200px }
this line only resized the single line input field and not the multi-line textarea.

Right now, the textarea box is abour 300px, but I’d like it around 200px

Please advise the best way to do this.
Thank you

http://wordpress.org/extend/plugins/ajax-contact/