Schumacher's "Woodberry" was an understated treatment for the Guest Bath window. Rather than divide the width into three equal sections, we instead left the motifs whole by slightly rearranging them and making a barely wider center section.
"Sheffield Valance" from M'Fay- but after planning, cutting, and joining the individual sections, I usually just draft the shape directly onto the fabric, free-hand, with erasable pen. This allows me to customize the long and short points of the treatment. (In the years before drafting onto the fabric, I probably fabricated 5000' of Sheffield valances, so I had a feel for how to draw those curves!)