Regular refers to a straight down drape. Design refers to two or more drapes from the same or additional crossbars, that may not always go straight down and may include additional material like ribbon to create the drapery design. For a 2 layered design, it would be 2x the drapery width.
A 6ft perforation is the most common and recommended for a regular drape, which would make the prices above for every 8ft of drape. If you don't want perforation (a flat sheet of cloth), then the price above will be for every 10ft of drape. It is common for designs to have a higher perforation.
Height & Color
Finally, you can choose the height you'd like your drapery. It is possible for us to adjust the sizes so part of the cloth is on the ground, expecially if you have a high ceiling. And we make the color picking easy!