Text field size not working

I’m trying to limit the size of a text field so it’s not the entire width of the screen using:
<label> Your Name [text* your-name size:40] </label>
The size:40 appears to be ignored. When I load the page with this form it displays Your Name field using the entire width of the browser.

I have other text and email fields with size:NN and none of them work. They all default to max width.

Using WP 5.2 with CF7 5.1.3