Size F (3.75 mm) hook
Simply soft size 4 Blue and White

Stitches used in US terms.
Ch chain
Sc single crochet
Dc double crochet
Hdc half double crochet
Sl st slip stitch
Skip
Cl/cl cluster stitch (work 3 dc in same st holding the last loop on each, then pull through all 4 loops at once) the ch 3 counts as 1st dc.
Stitches used in Uk terms.
Ch chain
Tr treble crochet
Dc double crochet
H tr half double crochet
Ss slip stitch
Miss
Cl/cl cluster stitch (work 3 tr in same st holding the last loop on each, then pull through all 4 loops at once) the ch 3 counts as 1st tr.