You will be pleased with the simplicity and laconism of Lombard Street Hat.
Great idea for a last minute gift for men and boys of all ages – can be worked with or without earflap-ties.

Sizes:
Brim circumference 44–46; 46–48; 48–50; 50–52; 52–54; 54–56; 56–58; 58–60 cm [17.3–18.15; 18.15−19; 19−20; 20–20.5; 20.5−21; 21–22; 22–23; 23–23.6) inches]

Needles and Materials:
Suzy Parker Yarns Merino Sport (100% Merino, 100 g – 300 m) – 40; 40; 50; 50; 60; 60; 80; 80 g [1.4; 1.4; 1.75; 1.75; 2.1; 2.1; 2.8; 2.8 oz]
Circular needles US 3 – 3.25 mm and US 1½ – 2.5 mm, or size to obtain gauge.
3 stitch markers

Gauge:
22 sts and 30 rows = 10x10 cm [4x4 in], over rib, with needles
US 3 – 3.25 mm, after blocking.