Koitto by Niina Hakkarainen

Koitto

Knitting
September 2012
Sport (12 wpi) ?
27 stitches and 35 rows = 4 inches
in rib
US 2½ - 3.0 mm
345 - 355 yards (315 - 325 m)
One size
Finnish

One size, but the rib is stretchy so can accommodate many head sizes.
The hem can also be folded up so it can be used as a regular hat. The mouth-opening can be visible then, but if it bothers, just turn in towards the back.