For this pattern, you’ll need:
Yarn
2 balls x 100 gr / 150 m (164 yds) Aran wool yarn in 2 different colours or as suggested:

Size S Colour A 67 gr / 100 m (109 yds), colour B 24 gr / 35 m (38 yds)
Size M Colour A 75 gr / 112 m (122yds), colour B 33 gr / 50 m (55 yds)
Size L Colour A 83 gr / 124 m (136 yds), colour B 37 gr / 56 m (61 yds)

Hooks
4.5 mm (7) crochet hook
6 mm (J/10) Tunisian crochet hook