I made a hat for my DH using the Turn a Square pattern by Brooklyn Tweed. I used Noro Cash Iroha andf Rowan Pure Wool Aran. I also made a matching hat for my baby and I think they turned out pretty good

I basically reduced the pattern by 1/3 to make the baby version, my son is 6 months and it fits him perfectly. There's a bit more info on my blog, but pattern notes as follows:
CO 64 st with smaller needles and knit in 2×2 rib for 1″ (or as long as you like).
Knit one row in stocking stitch, increasing by 8 stitches, then continue as per pattern, alternating stripes, until hat measures 3.5″.
K18, pm across round.
Decrease as set in pattern.
