Ikea PS Wall Shelf is a minimalist design created by Japan-based designer Keiji Ashizawa. In hallways one often has a range of things which differ in size and form – from clothes and slippers, to keys and mail. This wall shelf stores all these different things in an orderly fashion. The design, with the shelf leaning on the wall, gives a shallow depth which is good when space is tight. The form also reflects the items you can store; the lower shelves are larger and suitable for shoes or books, while the smaller shelves above are good for keys and pens.