Measurements
To fit chest
56 61 66 71 76 81 cm
22 24 26 28 30 32 inch
Length from back neck (approx)
33.5 37 43 49.5 54.5 58.5 cm
13¼ 14½ 17 19½ 21½ 23 inch
Short sleeve seam (approx)
7.5 7.5 7.5 7.5 10 10 cm
3 3 3 3 4 4 inch

Each source has a different set of recommended yarns. The following is from the King Cole version.

Materials
Big Value DK
2 2 2 3 3 3 100 grm balls
Big Value Baby DK
2 2 2 3 3 3 100 grm balls
Anti-tickle DK
4 5 5 6 6 7 50 grm balls
Anti-tickle Baby Wool DK
4 5 5 6 6 7 50 grm balls
1 button if required for pocket
2 buttons for front opening.