This octagonal cushion is part of an aperiodic tiling. This small section of the design does not demonstrate the unique properties of these tilings, which are non-repeating patterns.
Some interesting 3D effects can still be seen on this small piece. It is very similar to the centre of our Penrose afghan.
Buy using the link at the top of this page
or in Cushy Numbers - a book of 12 cushion patterns