Frjókorn hat is as light and airy as its matching Frjókorn sweater and a quick knit too. It is made with the same bland of Love Story and unspun plötulopi single with the motif in Léttlopi and I encourage you to use your sweater’s leftovers to make it. An alternative for a thicker hat would be to use a chunky yarn, for example Álafoss lopi.
The hat is knitted from the top down. It starts with a disappearing loop cast on and finishes with an Icelandic garter bind off. This little-known bind off is elastic, yet sturdy, and perfect to bind off a hat. Links to tutorials are included in the pattern.

Gauge: 10 cm / 4” = 15 sts and 20 rows in St st on 7 mm / US 10¾ needle with Plötulopi and Love Story held together.
Note that the gauge is unusually loose for the yarn.

Sizes: 5 sizes XXS,XS(S,M,L)
XXS,XS for Baby, Child, and (S,M,L) for Adults
Height 15,17(20,22,22.5) cm / 6 ,6.75)7.75,8.5,8.75)”
Circumference at largest: 37.5,42.5(48,53.5,58.5) cm / 14.5(16.75,19,21,23)” to fit head 35.5-40.5, 45.5-51(51-56, 53-58.5, 56-61) cm / 14-16,18-20(20-22, 21-23, 22-24)”