Measurements
40, 40, 45, 45, 51 cm
16, 16, 18, 18, 20 inch

Each pattern has a different set of recommended yarns. The following are from the Midgley and Catton version.

Materials
MIDGLEY AND CATTON Chunky Knitting
Trojan Chunky Knitting
3, 3, 4, 4, 4 balls
Maytime Double Double
2, 2, 3, 3, 3 balls.