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DIY Guide: Dressing Up a Quarter-Round Window with Custom Curtains

Pie-shaped quarter-round windows feature an arched edge and can be surprisingly simple to decorate. Your fabric choice should depend on the amount of light you wish to filter out, with sheer or lightweight options often chosen to soften glare.

By Hayden Hayes6 steps

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A quarter-round window has a charming pie-slice shape, with one curved arch along a single edge. Though it might look tricky to dress, these windows are actually quite straightforward to cover. The fabric you pick should be guided by how much light you want to screen out; sheer or lightweight fabrics are frequently selected to diffuse light and cut down on glare.

Hook and loop tape.

Hook and loop tape.

Step 1

Using a tape measure, determine the length of the window casing along its arched edge. Cut a strip of hook and loop tape to match that measurement with your scissors. Then double that figure to establish how long your fabric should be.

Step 2

Measure the vertical edge of the window to get its height. (Should the horizontal edge turn out to be the longer one, use that measurement instead.) Add six inches to allow for ruffles and hems, then cut your fabric accordingly.

Step 3

Create a 1/2-inch hem along every side of the fabric by sewing, then press the hems with an iron. Run a loose basting stitch along one of the long edges—this will become the arched side. Draw the thread of that loose stitch until the fabric's length matches that of the hook and loop tape.

Step 4

Attach the gathered edge's back side to the fuzzy (loop) portion of the hook and loop tape by sewing. Then firmly press the adhesive-backed hook side onto the curved underside of the window casing, making sure it adheres securely.

Step 5

At the 90-degree corner of the window sill, drive a cup hook in as near to the window as you can manage.

Step 6

Join the two hook and loop tapes by pressing them together. Draw the fabric evenly in the direction of the 90-degree corner. Using several rubber bands or safety pins, shape the fabric into a ball, tucking it underneath until it reaches your desired size. Secure the curtain by looping a rubber band or pin over the cup hook.