If knitted in dk with 3,25mm and 4mm needles it will fit 20” chest If knitted in 4ply with 3mm and 3,25mm needles it will fit 16” chest Requirements 3.25mm and 4mm needles for larger size and 3mm and 3.25mm for smaller size 2 x 15mm buttons 24 inches of ribbon for bonnet Piece of thin elastic for waistband 300-350g dk or 300g 4ply