css: overriding input[type="text"]

CSS looks like:

input[type="text"]
{
  width: 200px;
}

.small 
{
  width: 50px;
}

I have some text fields that I'd like smaller. I've tried a few different things, but can't figure out how to get specify an input field with, say, width 50.

Textbox is rendered with:

  <%= Html.TextBox("Order","",new { @class="small", size = 5 } ) %>

Size attribute is ignored, and .small doesn't override the input.