Knitting onto larger needles

I’m making a little hat for my youngest granddaughter. http://www.debbyware.com/product.aspx?sku=HCS
I’m knitting it on a 16 inch size 4 circular needle. Doing the ruffle is really crowded (I’ve upsized the hat) and I wondered if I can knit this onto a longer circular needle.

Will this work or will this kill my hat?
Thanks,
Nikki

As long as the stitches fit around the needle without stretching horribly, you can move up.

Ingrid, thanks so much. :heart:
Nikki