My friend Dave really wanted a new duvet cover so we went to ikea and picked out 5 yards of fabric and a bed sheet. I cut the 5 yards down to 2.5 yards and on each of those I cut 10 inches off of one side. Sewed the two bigger pieces together and right sides together sewed around 3 edges and left an opening to put the duvet in. It was super easy! Also I made him a little bag with some of the leftovers.