User-agent: *
Allow: /index.php
Allow: index.php
Allow: /contact_us.php
Allow: /in-store.php
Allow: /shipping.php
Allow: /size.php
Allow: /about_us.php

Disallow: /

The "User-agent: *" means this section applies to all robots. 

The "Disallow: /" tells the robot that it should not visit any pages on the site.