Worsted weight yarn could also be used. This is specific to a certain kind of wooden coat hanger. - I’ve seen them sold at Ikea & Tesco, for example. The gauge works out to 10 dc = about 2.5 in. (or 6 cm). The terms are USA crochet terms.
The pattern was improved for clarity in August 2010.

The flower embellishment is the Helenuim from Lesley Stanfield’s book “100 Flowers to Knit & Crochet.”