Start by measuring the inside top of your window. Mine was exactly 23 inches. Then figure out how long you want your valance to hang and cut your fabric. I doubled the length on mine, so that I could fold the fabric over – doubling it to give it some weight so that it would hang better.
Then you’ll want to iron out any wrinkles and use a hot glue gun to attach the trim around the edges. The trim will hide your unfinished fabric edges making it completely unnecessary to hem them – yes, this is basically a lazy do-it-yourselfer’s dream project.
I’m currently working on finishing up a few details in my kids bathroom and this valance was the perfect way to add a bit more interest to the space. I plan to use some frosted window paper for privacy, so I only needed the window treatment for looks not function.