Ajustar el tamaño de las Textarea con CSS

Motivación

El tamaño o la etiqueta que el textarea tiene por defecto no es siempre el que se desea. Este código muestra como cambiar esto.

Imagen de pantalla

Aquí tenemos un ejemplo. El ejemplo incluye el textarea por defecto y uno pequeño, mediano, grande y extra grande. Si el contenido excede el tamaño del textarea aparece la barra de scroll de forma automática.

Ejemplo Funcional

<html
 xmlns="http://www.w3.org/1999/xhtml"
 xmlns:xf="http://www.w3.org/2002/xforms">
   <head>
      <title>XForms textarea demo</title>
      <link rel="stylesheet" type="text/css" href="textarea.css" />
      <xf:model>
         <xf:instance xmlns="">
            <data>
               <Default>Default Default Default Default</Default>
               <Small>Small Small Small Small Small Small Small Small Small Small Small
               Small Small Small Small Small Small Small </Small>
               <Medium>Medium Medium Medium Medium Medium Medium Medium Medium Medium Medium
               Medium Medium Medium Medium Medium Medium Medium Medium Medium Medium Medium
               Medium Medium Medium Medium Medium Medium Medium Medium Medium Medium</Medium>
               <Large>Large Large Large Large Large Large Large Large Large Large Large Large
               Large Large Large Large Large Large Large Large Large Large Large Large Large
               Large Large Large Large Large Large Large Large Large Large Large Large Large
               Large Large Large Large Large Large Large Large Large Large Large Large</Large>
               <XLarge>X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large
               X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large
               X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large
               X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large
               X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large
               X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large
               X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large
               X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large X-Large
               X-Large X-Large X-Large X-Large X-Large X-Large X-Large</XLarge>
            </data>
         </xf:instance>
      </xf:model>
   </head>
   <body>
      <p>Resizing textarea and scrolling.</p>
      <xf:textarea ref="Default">
         <xf:label>Default: </xf:label>
      </xf:textarea>
      <xf:textarea class="small-textarea" ref="Small">
         <xf:label>Small: </xf:label>
      </xf:textarea>
      <xf:textarea class="medium-textarea" ref="Medium">
         <xf:label>Medium: </xf:label>
      </xf:textarea>
      <xf:textarea class="large-textarea" ref="Large">
         <xf:label>Large: </xf:label>
      </xf:textarea>
      <xf:textarea class="x-large-textarea" ref="XLarge">
         <xf:label>X-Large: </xf:label>
      </xf:textarea>
   </body>
</html>

Hoja de estilos (textarea.css)

@namespace xf url("http://www.w3.org/2002/xforms");

/* put each textarea on its own row */
xf|textarea {
 display: table-row;
}

xf|textarea > xf|label {
   display: table-cell;
   font-family: sans-serif;
   font-size: 10pt;
   font-weight: bold;
   vertical-align: top;
   text-align: right;
   padding-right: 3px;
}

textarea {
   font-family: Courier, sans-serif;
}

.small-textarea textarea { 
   height: 4.4em; /* a bit less than four lines to demonstrate scrolling */
   width: 300px;
}

.medium-textarea textarea { 
   height: 6em;
   width: 400px;
}

.large-textarea textarea {
   font-family: Courier, sans-serif;
   height: 10em;
   width: 500px;
}

.x-large-textarea textarea {
   font-family: Courier, sans-serif;
   height: 20em;
   width: 700px;
}