Here, we are going to talk about how to create a specialty valance. A specialty valance looks similar to a roman shade that has been raised 2/3 of the way up. It is a very popular style these days and usually costs upwards of $200 to have one custom made. However, by using a simple rod pocket drapery panel, you can create your own custom-look specialty valance in about 15 minutes. Let's take a step-by-step look at how to create this fabulous designer window dressing! 1. When purchasing a drapery panel for this project, you will need to take a few things into consideration. Chicago First, the width of most panels are about 46 ³ - 52 ³; make sure that this width will be enough for your window.