You’ll need 50 gr. of worsted weight cotton yarn, a 5 mm crochet hook and a set of clasps.
It’s all crocheted back and forth. Ch 74.
R1: Starting in 2nd ch from hook sc 73, turn= 73 sts
R2-4: Ch 1, sc 73, turn= 73 sts
R5: (Ch 4, tr 3) in the first st, sk 2 sts, {(sc 1, ch 3, tr 3) in one st, sk 2 sts} rep { } 23 times, sc 1.
Fasten off.
Weave in all ends an sew the clasps to both edges.
The collar is ready.
ABBREVIATIONS
ch: chain
R: row
st: stitch
sc: single crochet (UK double crochet)
tr: treble crochet (UK double treble crochet)
sk: skip
rep: repeat