I am using `<p:fileUpload>` tag for file upload functionality. But I need to change the text box size which I am unable to.

```
<h:outputLabel id="attachment_label" value="Add Attachment(s)" styleClass="atf-label" />        
<p:fileUpload value="" mode="simple" style="width:350px"/>

```

I tried to set the width in CSS, but it didn't have any effect.