You will need:
4mm crochet hook
Oddment (5 grams) of DK weight yarn
1 x press stud / popper / snap fastener
1 x button (approx 1.5cm diameter)
Make 26 chain and starting in the 2nd chain from the hook, work 1 double crochet stitch (dc - US name, sc) into each chain. Turn.
Next row: Make 1 chain, and work a row working 1dc into each stitch.
Next row: Make 1 chain and work 1 dc into each stitch, until 4 sts from the end. Work 2 ch, miss the next two stitches, work 1dc into each of the last 2 sts.
Next row: Make 1 chain and work 1 dc into each stitch (including the two chain)
Next row: Make 1 chain and work 1 dc into each st to end. Fasten off yarn.
Weave in the ends.