Materials suggested in Lena: yarn and needles as above for an approx. diameter of 64 cm/25”.

Materials suggested in Hendes Verden:
100 gr Mayflower Maxi (size 10 crochet thread) and needles size 2.50 mm, hook size 1.50 mm, for an approx. diameter of 67 cm/26”.

Not credited, but looks like a Niebling.