Diameter and Materials Required:
7.6” (19 cm) using fine sewing silk, and knitting needles US Size 5-0 (1.00 mm)
9.6” (24 cm) using medium weight crochet thread, and knitting needles US Size 1.5 (2.5 mm)
Number of Pattern Rounds: 39 note: it’s 40 rounds and a crochet bind off.

Abb. 29 photo and directions page 14, chart Fig. 23.