Gauge
1 cluster and 2 rows to 2.5cm using 5mm crochet hook

Worked in one piece to the armholes.

Measurements
To fit chest
41, 46 cm (16, 18 in)
Length from back neck
25, 27 cm (9¾, 10¾ in)
Sleeve seam
13, 14 cm (5, 5½ in)

Each source has a different set of recommended yarns. The following are from the Studley pamphlet.

Materials
STUDLEY DOUBLE KNITTING
Tricel/Nylon Crepe or Supreme
5, 6 balls
Superwash (machine washable)
5, 6 balls
Super Pure New Wool
5, 6 balls
Studleyknit
5, 6 balls
Petspun Nylon
4, 5 balls
Serenade
5, 6 balls
STUDLEY BABY QUICK KNITTING
Baby Supreme
4, 4 balls
Ribbon
3 buttons.