Materials suggested:
Crochet thread size 20 and needles Nr. 2 for an approx. diam. of 135 cm. (Old German needle size).

Note
This pattern is called Campanula (Campanule) on the pattern/chart folder, and Glockenblume inside the flap of Spitzendecken.

Meyers Strickschrift 1444/VIII:
Advertised as a send-away pattern on page 4 (Abb.5) of Meyers Handarbeitsheft, Nr. 36 Kunststricken.