From the North American Schachenmayr website:
Schachenmayr original Boston Style is ideal for hats, as demonstrated by this model with its attractive color mix, emphasised by the simple rib pattern. Finished with a pompom, it’s perfect for dads who love to be out in the snow playing with the kids.

Finished dimensions:
Completed hat is designed to fit about 22 to 22.75 inches (56 to 60 cm) head.

Yarn Information:
Photographed in 00550 aquatic color
2 skeins
132 yards

Gauge notes:

• US 10.75-11 are the listed pattern needles. The instructions state that 7.0-8.0 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.