There is a choice of three different pattern panels, each shown in the photograph. The sweater is fastened at the back of the neck with press fasteners.

Measurements
To fit chest
46, 51, 56, 61, 66 cm (18, 20, 22, 24, 26 in)
Length from shoulder
24, 28, 31.5, 35.5, 40.5 cm (9½, 11, 12½, 14, 16 in)
Sleeve seam
14, 16.5, 20.5, 26.5, 31.5 cm (5½, 6½, 8, 10½, 12½ in)

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

Materials
Big Value Baby Double Knitting
2, 2, 2, 2, 2 X 100 gram balls
Stitch holders
Press fasteners.