A pattern for a tie-front bolero in Sirdar Firefly. Needles: 8mm (UK0, US11) Number of 25g balls of Firefly: Chest size 32 to 34 inches: 5 balls. Chest size 36 to 38 inches: 6 balls. Chest size 40 to 42 inches: 7 balls. Photograph shade of Firefly: 888