Pillows

A pillow is a small and generally a soft item which is meant to support the head, and usually used when sleeping in a bed. It can also be used to support the body or the legs when sitting on a couch or chair

  There are other types of pillows which are designed especially for beauty and not for sitting or comfort and they are called a "throw Pillow"

A pillow is filled with a substance which can be made from foam, synthetic or feathers.  In the past pillows were filled with straw, but it was not comfortable and is almost not used today, then feathers were for the wealthy.  Nowdays the most common filling is artificial.

The filling is surrounded by a cover or shell which is made by cloth or silk, this cover is called a pillow case.  In houses, pillows, which are also named cushions,  often include a zipper, so the cover of the pillow can be removed instantly. On bedroom pillows there is no zipped cover, instead they have a simple "pillow case" that can be removed easily and washed

Modern pillow sizes

A measurement of pillow size is called 'Oxford Size', and is used in countries where English is the primary language, its measurements are  50 cm on 75 cm (20 on 30 inches).