Measurements
Average head size

Each pamphlet has a different set of recommended yarns. The following are from the Richard Poppleton version.

Materials
POPPLETON DOUBLE DOUBLE KNITTING
Bijou Chunky 2 balls
Pica 2 balls
Dandy 3 balls
1 small ball of contrast colour.

Materials for Complete Striped Set
POPPLETON DOUBLE DOUBLE KNITTING
Bijou Chunky 7 balls
Pica 9 balls
Dandy 11 balls
1 small ball of contrast colour.