Young Blonde Girl With Long Hair And Blue Eyes Posing On The Pillow On The Floor At The Window With Flowers

Lumbar pillows are designed to support the inward curve of the lower back, filling the space created between the lower back and the back of the chair when in a sitting position. These pillows are generally used to support the lower back while driving or sitting, such as in an office chair. Orthopedic pillows are similar to Memory foam pillows.
Decorative
Decorative Pillows serve a dual purpose. They likely have fancy cover material which serves to decorate the room where they are found. Since Decorative Textiles are commonly 54 inches in width, many decorative pillows finish about 17x17 inches. (54/3 = 18 less seam allowance) When used to decorate a fully made up bed, decorative pillows are likely thrown aside at bedtime, since they are not covered with a laundrable pillow case, thus, while found on the bed, they are primarily there for decoration, hence they fall under this category. These pillows may be custom made, as well as made by freelancers.