Size 40 thread.
Plastic rings 1/2” 1.3 cm in diameter on outside and 3/8” 0.9 cm in diameter on inside - 97

First 2 rounds measure a little over 5/8”, 1.7 cm in diameter.

Advanced. A crocheted center pattern of picots with 97 rings in “arms’ with crochet leaf between each arm.

Pattern 1 in Decorative Crochet.
Pattern 1 in Crochet Monthly.
Pattern Hojas de Acebo in Puntorama Ganchillo; shown on cover.
Pattern Etoile a 8 branches in 1000 Mailles.