From the Knit Rowan website:
Knit this accessory beaded beanie from Elegant Knits. Designed by Martin Storey using the wonderful soft blend yarn Wool Cotton 4ply (wool and cotton), this softly ribbed hat will please anyone who likes to add beads to their knitting.

Finished dimensions:
Completed hat is designed to fit an average woman’s head.

Yarn information:
Photographed in Jacaranda 502
2 skeins
394 yards

Extras:
Approximately 400 small glass beads to pre-string.