Knitted headband/earwarmer

Sorry for the cell phone photos but these are all I had of this headband/earwarmer. 
I am not a good pattern writer but this seems straightforward to me.

Knitted Headband/Earwarmer

Worsted weight yarn held double throughout
Size 11 US knitting needles
1 button 30mm

M1 by YO

CO 5 sts and knit across.  You will be increasing in the stitches before and after the center st so you may want to mark it.

Row 1: K2, YO, K1, YO, K2 = 7sts
Row 2: K2, purl YO through back loop (PYOBL) throughout so as to leave no holes, P1, PYOBL, K2
Row 3: K3 (from now on K3 selvedge sts on each side on every row), YO, K1, YO, K3 = 9sts
Row 4: K3, PYOBL, P1, PYOBL, K3
Row 5: K3, K1, YO, K1, YO, K1, K3 = 11 sts
Row 6: K3, P1, PYOBL, P1, PYOBL, P1, K3
Row 7: K3, K2, YO, K1, YO, K2, K3  = 13 sts
Row 8: K3, P2, PYOBL, P1, PYOBL, P2, K3
Row 9: K3, K3, YO, K1, YO, K3, K3 = 15sts
Row 10: K3, P3, PYOBL, P1, PYOBL, P3, K3
Row 11: K across
Row 12: K3, purl across to last 3 sts, K3

continue rows 11 & 12 until there are 31 garter row bumps (along selvedge edges) ending with a row 12.

Decrease rows:
Knit side: Work opposite of increase rows by K2tog before and after center st. 
Purl side: K3, purl across to last 3 sts, K3
Decrease  until 5 sts remain then BO leaving 12" tail

Use tail to crochet 3 chains and attach to opposite side.  Weave in ends.  Sew on button and accessorize with a crocheted flower of your choice.