Sew half of cast on edge of mitt to back of glove 1cm (½ inch) below division for fingers. Make a buttonloop at top of mitt. Sew button to back of glove to match loop when mitt is folded back.

Measurements
Width above thumb
16, 18, 19, 21 cm
(6½, 7¼, 7½, 8½ in)

Each source of this pattern has a different set of recommended yarns.
The following are from the St John’s Wools version of the pamphlet.

Materials
Minster DK 50 gram balls
40, 50, 60, 70 grams in two colours
2 Buttons.