This ridged star pattern, worked to the given size, will produce a washcloth measuring about 8x8" (20x20cm).
But, if washcloths aren’t your thing, details are provided to work to any length and width. Why not make a scarf, a blanket or a bath mat!
You will need about 60g of 100% dishcloth cotton for the suggested size, a 3.50mm hook and a needle for neatening ends.
Other yarn and hook combinations will work with differing results.
The pattern is written in UK terms with a table of US equivalents provided as applicable.