title: Limit the number of cart items in Woocommerce
body: <p>I am using Woocommerce and need the following:</p>
  
  <ol>
  <li><p>As product is being sold to another country and that country's customs only allow a total quantity of 6, so I need to prevent customers from order more than 6 items (products).</p></li>
  <li><p>6 is the total of items or products. Customer can order 1 product in quantity of 6 or 2 products with quantity of 3 each. Customs will only allow a total number of items to be 6.</p></li>
  <li><p>If there are more then 6 items in the cart, a warning should appear and prevent customer from proceeding to check out.</p></li>
  </ol>
  
  <p>Is this possible to limit cart items to 6 and to display a message when this limit is exceeded?</p>