Need stitch pattern for hat--rib and garter

I see this hat at, item # 837435. Here's a link:

I'd like to knit a hat and scarf with this pattern.

Does anyone here know the stitch pattern for this, please? I can work out the whole hat pattern (size, # of stitches, color changes, etc.). It looks like one rib, then 4 garter stitches repeated. I've tried to copy it myself but it hasn't worked out.

I also prefer to knit hats on circular needles. But if I have the pattern for straight needles, I can convert it myself.

Thank you!