To make with QK (sportsweight/5ply) yarn, use larger needles - 4.5mm and 3.75mm - but otherwise follow the pattern as written for DK.

Measurements
To fit chest size
40, 45, 50 cm (16, 18, 20 in)
Length to top of shoulder
22, 25, 28 cm (8¾, 10, 11 in)
Sleeve seam
13, 15, 17 cm (5, 6, 6¾ in)

Materials
Peter Pan Darling DK or
Peter Pan Wisp or
Peter Pan Lustre Knit
4, 4, 5 X 20g balls
3mm crochet hook
4 buttons
Cable needle for patterned version.

This pattern is on page 128 of The Baby Knitting & Crochet Book. The illustration is on page 129.