Making your own duvet cover allows for many more options than you will likely find at your local home store. Reversible patterns that coordinate with your room and beaded appliqués that add impact to your duvet cover are two of the design choices you can make if you create your own duvet. Finished king size duvet covers range from 85 to 92 inches wide and from 98 to 108 inches long. Queens are 85 to 90 inches wide and long, full sizes are 85 to 90 inches wide and 75 to 80 inches long. Most manufacturers sell one duvet cover to fit both a full and a queen size bed, but making your own allows you to customise the size if you have a full bed. Twin duvet covers are 63 to 68 inches wide and 85 to 88 inches long. You can find soft, washable fabrics that are extra wide to allow for fewer seams at your local speciality fabric store or from online retailers.
Measure the size of the comforter you plan to cover with your duvet. Add 2 inches around the perimeter to allow for the edge seams. If the fabric you select for your duvet is standard 54 inches wide or smaller, you will need to piece sections together for the cover. Allow enough fabric for a 1-inch seam each time you piece a section. Remember to purchase enough fabric for both sides of the duvet. Most duvet covers have button closures, but you can also use Velcro if you are not adept at making button holes. You will need straight pins, a sewing machine, thread, an iron and a measuring tape to complete this project.
Create the two layers for your duvet cover by piecing the fabric together, if necessary, for the width of each layer. Measure 1/2 inch along the fabric edges and pin the seam together. Sew a straight line to join the fabric and then iron the seam open for a flat surface underneath the duvet. Before you join the two layers together, pin a 1-inch seam along the bottom of each layer of the duvet. Create button holes along one edge, spaced every 4 inches. To join the two fabric layers, place them face-to-face and pin around the three remaining sides of the perimeter. Sew around the edges where you have pinned the fabric together, removing the pins as you go. Iron the seams open, then turn your duvet cover inside out, so that the face of the fabric is visible. Insert pins to mark the placement of the buttons, then sew them on to finish your duvet.