You can use any hook size and yarn weight with this stitch.
This stitch information is written in full English with no abbreviations to help beginners. It includes a chart diagram as well as a free pattern that uses this stitch.
This pattern is in US terminology.
st(s) = stitch(es)
ch = chain
sl st = slip stitch
sc = single crochet (dc in UK terms)
dc = double crochet (tr in UK terms)
tr = treble crochet (dtr in UK terms)
chsp = chain space