title: How to get the length of an observable in Knockout?
body: <p>I have an observable sizeDetails in knockout and i need to get the length in knockout template. My observable is below</p>
  
  <pre><code>sizeDetails: ko.observable()
  </code></pre>
  
  <p>On Ajax call success i have set observable as below</p>
  
  <pre><code>  self.sizeDetails({sizeGuideDetails: sizeGuideDetails,
                      shopBySizeDetails: shopBySizeDetails
                    });
  </code></pre>
  
  <p>How to get sizeGuideDetails and shopBySizeDetails length  seperately in knockout template</p>