Making this pattern larger

[myjoyoverflows]

I absolutely love this pattern and want to knit it for my 6 year old. However, the size only goes up to 5t and she is much larger than that. I have Caron Simply Soft and would like to make the pattern fit up to a tween size. I'm confused as to how to do that. Any and all help would be appreciated! Thank you!

http://www.ravelry.com/patterns/library/fancy-ribby-hat

[RochesterKnitter]

Well, you could start by going up in yarn size and needles, which would make everything larger.

Then, after determining your gauge, add a rib repeat or two (CO extra sts in multiples of 6) as needed to get the desired circumference.