A pattern for a top in Sirdar Firefly. The straps are knotted as part of the design. Needles: 8mm (UK0, US11) Number of 25g balls of Firefly: Chest size 32 inches: 4 balls. Chest size 34 inches: 4 balls. Chest size 36 inches: 4 balls. Chest size 38 inches: 6 balls. Chest size 40 inches: 6 balls. Chest size 42 inches: 6 balls. Photograph shade of Firefly: 887