From the North American Schachenmayr website:
Bobble/pompom hats are always popular with kids, and this model with its eye-catching three-dimensional pattern is no exception. The subtle color variegation of Schachenmayr original Boston Style will make this a popular and simple winter accessory for leisure activities.

Finished dimensions:
Completed hat to fit 3 head sizes -- about 16 to 17 inches (40 to 43 cm), 17.25 to 18.5 inches (44 to 47 cm), and 19 to 20 inches (48 to 51 cm).

Yarn Information:
Photographed in 00590
2 skeins
132 yards

Gauge notes:

• US 10.75-11 and US 11-13 are the listed pattern needles. The instructions state that 7.0-8.0 mm and 8.0-9.0 mm needles can be required in order to achieve gauge for the different fabrics.
• 7mm needles are listed in the pattern as the equivalent of US 10.75 needles.