Cushion: Wind Up
Mathematically, this is an Archimedean Spiral. That means it moves out from the centre by the same distance on each rotation.
Spirals of crochet do this automatically.
This is a flat cushion, suitable for a kitchen stool or chair. Make it reversible for a change of mood.
Buy using the link at the top of this page
or as one of twelve patterns in 12 Pillows of Wisdom