If a KingSizeDirect.com coupon code isn't working, try the following steps:
- Check the expiration date of the coupon code.
 - Ensure the code is entered correctly, without any typos or extra spaces.
 - Review the terms and conditions of the coupon to confirm it applies to the items in the cart.
 - Clear the browser cache and cookies, then try applying the code again.
 - Try a different browser or device to see if the issue persists.
 - Contact KingSizeDirect customer service for assistance with the coupon code.