A duvet cover is a removable cover that you place over a comforter on a bed. Duvet covers are ideal for keeping comforters clean, and they enable quick decorating changes in a bedroom. If you like the look of a quilt on a bed but also want a duvet, you can make a quilted duvet cover. The process involves an extra step to quilt the top of the duvet before sewing it into the duvet cover.
Measure the dimensions of the comforter you will be covering. Use the top sheets or cut three pieces of fabric that are ½-inch larger than the comforter on the bottom edge and the two side edges. Make the top edge of two of the sheets or the fabric 5 inches longer than the comforter. Cut the batting and the third sheet or fabric so it is the same size as the comforter.
Lay one of the larger sheets or fabric pieces flat, with the right side facing up. Determine the quilting design you will stitch onto this sheet. You must leave the top 5 inches of the fabric unquilted (do not extend the quilting design into this area). You may opt for a geometric design, swirls, circles or a simple all-over stitch. When you decide what kind of design you want, draw it onto the sheet or fabric with the fabric pen.
Lay the smaller sheet or fabric piece flat on your work surface (a floor is ideal) with the wrong side facing up. Place the batting over this fabric, matching the corners and sides. Place the sheet or fabric with the quilting design on top of the batting with the design facing up. Match the edges and corners (with the 5-inch extension at the top). Pin these three layers together securely over the entire surface of the fabric to ensure the fabrics do not shift.
Quilt the layers with the sewing machine, stitching along the lines you drew in Step 2 until you have sewn over every line. Remove the pins.
Lay out the quilted duvet cover with the wrong side facing up. Turn under the top edge of the cover ½-inch and press the edge with the iron. Flip the quilted layer over so the right side is facing up.
Place the remaining sheet or fabric (the back of the duvet) over the quilted layer with the wrong side facing up. Match the sides and corners and pin all of the layers together.
Stitch the bottom edges together using a ½-inch seam allowance. Stitch around each bottom corner and extend the stitching along both side edges 3 inches. Stop stitching at this point on each side. Start stitching again on each side edge approximately 5 inches from where you just stopped (this will leave a 5-inch opening at each bottom side edge). Continue stitching each side edge and stop when you are 5 inches away from the top edge.
Fold the fabric over ¼-inch along the 5-inch bottom openings and stitch these folds down to finish the edges of the bottom openings.
Fold down the top ½-inch of the backing sheet and press this fold. Next, fold the backing sheet down 2.5 inches and press this fold. Stitch along the side edges and along the folded edge to secure this hem. Turn the duvet right side out and make sure the corners are crisp and pointed.
Measure the extending top of the duvet cover and fold this portion at the halfway point with right sides of the fabric facing each other (you already folded and pressed the top ½-inch edge). Press this new fold. Stitch along both side edges using a ½-inch seam allowance. Turn this extension right side out and you will have a finished top edge of the duvet cover. Pull the corners out so they are crisp and pointed.
Attach the female half of a length of Velcro along the entire inner edge of this fabric extension. Attach the male half of the Velcro along the backing edge, making sure you place the Velcro in the proper spot so that when you fold the top edge of the fabric extension over, it will line up properly.
Place the comforter into the duvet and adjust the fit through the bottom openings and the top edge. Close the Velcro to finish.