Crochet-covered button - free pattern

I've just finished a lacy shawl that can also be used as a shrug with the addition of buttons. The buttons had to be of the same material, so it would not distract from the look when worn as a shawl or scarf. I tried to make soft crocheted buttons, but it didn't work for this project...so I just used ordinary plastic buttons and covered it with crochet. Its quite easy and looks more professional.

Meanwhile, thought I'd share here how I made the crochet-covered buttons ;)

Crochet-covered button
Materials:
Ordinary button, 1/2 inch diameter
Crochet thread size 8, or 3-ply light fingering yarn
Crochet hook size 2mm (3/0)
Special st:
sctog - insert hook into st and draw up a loop, insert hook into next st and draw up a lp, yarn over and draw through all 3 lps on hook.

Note: this is crocheted in a spiral, do not join rounds.
Rnd 1: Ch 2, 5 sc in 2nd ch from hook. (5 sc)
Rnd 2: 2 sc in each sc (10 sc)
Rnd 3: (Sc in next sc, 2 sc in next) 5 times. (15 sc)
Rnd 4: (Sc in next sc, sctog the next two sc) 5 times. (10 sc)
Rnd 5: Sc in each of the next 10 sc. Sl st on next sc. (10 sc)
Fasten off, leaving 10 inches for sewing. Insert button. Sew the last stitches together to close, before sewing on to the project.