From project description:
“Note that Meandering Lattice is reversible, so a matching scarf can be made”
from the designer: “Yarn: Noro Cash Iroha, 2 skeins. I lost the ball bands, so I can’t remember what color it is, but it’s eighty-something. Beige. Needles: Size 8, 16” Addi circular (used 2 circs for the crown). Gauge is not terribly crucial - the hat fits very loosely without the ribbon. Any yarn that knits up on a 7-9 needle is probably fine.”