Measurements
To fit chest sizes
40, 45, 50 cm (16, 18, 20 in)
Finished measurement
46, 51, 56 cm (18, 20, 22 in)
Length to top of shoulder
26, 28, 30 cm (10¼, 11, 11¾ in)
Sleeve seam
13, 15, 17 cm (5, 6, 6¾ in)

Each pattern has a different choice of yarns. The patterns recommend quickerknit yarn (sport or 5 Ply), or double knitting, with the same instructions for both weight yarns. The following are from the Midgley and Catton version.

Materials
Mascot Courtelle Nylon Baby Quick Knitting
5, 6, 7 balls
Tulip Nylon Baby Quick Knitting
5, 6, 7 balls
4 buttons.