[Plugin: Custom Contact Forms] Changing one field input size in a form

I created a contact us form successfully although the “message field input size” is the same as the “name field input size” and every other “field input size.” Looks kind of goofy considering a message will be bigger than the field input size.

It will allow me to type a full message although it is viewed on the form as the example I am displaying:
Name: /Ryan Troy /
Message: /The message continues with…/

and I want it to be like this:
Name: /Ryan Troy /
Message: /The message continues with more visibility so the the whole message can be seen on the form input box./

Any advice how to increase the one field input size without affecting ALL the field input size?

http://wordpress.org/extend/plugins/custom-contact-forms/