King Size Direct offers its King Size Men's Plaid Double Brushed Flannel Shirt in six colors (Cobalt Plaid pictured) for $13.36 plus $5.99 for shipping. That's $32 off list and the lowest total price we could find. It's available in size XL.

Of note, it's also available in 4XL and 5XL in Red Plaid for $14.84, also plus $5.99 for shipping.