title: Magento Configurable Product Attribute
body: <p>I would like to add a parameter to each option of a configurable product
  For example- I want to create pillows in 3 sizes - S, M, L
  but each size of pillow uses some z yards of fabric which varies for each size.</p>
  
  <p>The following image displays it better. Any ideas on how I should proceed? *I am fairly new to Magento development. Is this something that can be achieved out of the box or needs to be coded?</p>
  
  <p><img src="https://i.stack.imgur.com/dJbcu.png" alt="So each size has a textbox for entering yards associated with each size"></p>