We should mention that there are also swag valences and the main difference is that a valence is at the top, or even slightly above, the window area.
Draping, or looping, a length of fabric over curtain rods or horizontal poles is the most common way to create swag curtains.
Here is an easy 4-step process to create great-looking swag curtains that have one loop. For an even more spectacular swag with more loops, simply use a longer piece of fabric.
1. Mount the brackets and install a decorative curtain rod. It is best to mount the brackets on the outside edge of the window trimming and have the rod positioned just above the window trimming. The completed window treatment will drape down along the trim on the side and across the trim on the top.
2. Using a long piece of string, thread it up and in back of the curtain rod’s left side. Drape the string over the rod and let it swag to the right side of the rod. Thread the piece of string down and behind the curtain rod. Now, adjust the string on each side of the window as well as the swag in the center. When you like the overall length and the center swag, cut off the excess string. Measure the piece of string that you adjusted and that will tell you how long the fabric should be. It is suggested that the swag curtains be made from fabric that is 54 inches wide.
3. Fold one half-inch of fabric on one of the short ends to the wrong side of the fabric and press that fold. Fold the end a half-inch one more time. Press and pin the hem and sew a top stitch as close to the folded edge as possible. Do the same thing for the other short end as well as the two long sides of the fabric.
4. Hold the middle part of the length of fabric in your hand and center it over the window. Drape the fabric over the rod much the same way you did with the piece of string while keeping the right side of the fabric facing forward. Arrange the fabric along the sides of the window as well as the center swag to get just the right look.
WOW… You now have swag curtains!
You might be pleased to know that there is another way that is even easier and more affordable.
Start by screwing cup hooks in, or near, the top outside corners of the window trimming. Tie a ribbon around the fabric at the two corner swag points and hook the ribbon over the cup hooks. Adjust the fabric to get the desired look. Also, you can attach artificial flowers or other types of decoration over the ribbons if you want to add another decorative touch to your swag curtains.
By the way, floor length curtains are often used in a room where a formal look is desired while shorter lengths tend to be used more in casual and relaxed settings.