Cordonnet crochet cotton size 40. Steel crochet hook US size 11 (1.0 mm) or size for gauge.

Rounds 1-3 = 1 3/8” across.
Rounds 1-5 = 2 3/8” across.

Intermediate. Text supplements chart.

Pattern 5, page 11 of Decorative Crochet 44.
Called “Moisson” in 1000 Mailles.