I find the default TextBox (input) length too short for many of my fields. I've come up with a way to change the length using css. Since I haven't seen this published, I thought I'd share.

First add a style to the <ui:style>

Code:
    .field500 {
      padding:2px;
      width: 500px;
    }
Then add the style to the field

Code:
<g:TextBox styleName="{style.field500}" ui:field="trail"/>
Enjoy
Dan