You will need a set of 4 double pointed needles in size US 4 (3.5 mm).

Finished measurements:
Front/or back (not circumference): 7.5(7.75, 8.25, 8.75)“ 19(20, 21, 22) cm
Finished length: 6.75(7.5, 8.25, 9)” 17(19, 21, 23) cm

Yarn used:
Rowan Baby Cashsoft Merino
Shown in shades 126 Puddle and 124 Duckling - 1(1, 1, 2) balls

also shown:
Rowan Summerlite DK
Shade 478 Moon - 1(1, 1, 2) balls