Requirements:
4mm crochet hook
30g of Double Knit cotton yarn
button
darning needle

Abbreviations:
dc double crochet
hdc half double crochet
sl st slip stitch
ch chain
st(s) stitch(es)
beg beginning
rep repeat
sk skip
RS right side

Special Stitches:

3-ch picot: 3 ch directly after last stitch,
sl st into the first ch of the picot,
continue with next stitch in pattern.

Notes:

This collar fits a neckline circumference of 50cm. To make the collar longer or shorter, increase or decrease the beginning chain in multiples of 4 (so add on 4 more, or 8 more, or 12 more than the given number of required chain sts).