This pattern is proposed in 3 different qualities of yarn.

Gauge for Oxygene is : 23 x 30 = 4” on needle 3.5 mm (yarn needed 8 to 11 skeins)

Gauge for Aviso is : 17 x 22 = 4” on needle 5mm (yarn needed : 10 to 15 skeins)

Gauge for Pure Laine 3.5 is : 21 x 30 = 4” on needle 3.5 mm (yarn needed : 9 to 14 skeins)

7 buttons with 22 mm diam are needed