Here's a quick guide for folding duvet covers: Lay the duvet cover flat on a large surface, such as a bed or table. Fold the duvet cover in half lengthwise, with the opening at the bottom. Fold the duvet cover in half again, this time width wise. Starting from one end, roll the duvet cover tightly towards the other end. Once rolled, fold the rolled duvet cover in half to create a neat square. Store the folded duvet cover in a drawer or on a shelf. That's it! With a little practice, you can fold