USA terms Preemie~ Circumference 13”(33cm) Height 4.5” (11cm) 0-3 mths Circumference 14”(35cm) Height 5” (13cm) 3-6 months Circumference 16”(40cm) Height 6.5” (16.5cm) 6-12 months Circumference 18”(46cm) Height 7.5” (18.5cm) 1-3 years Circumference 19”(47cm) Height 8” (20cm) Requirements Crochet hook F/4mm Yarn USA light worsted (3), UK double knitting Preemie 0-3 mths 3-6 mth 6-12 mth 1-3ys 0.7oz 0.7oz 0.9 oz 1oz 1.4ozs Frog hat Scraps of white and black Bear hat Scraps of cream and black, stuffing for nose Chick hat Scraps of dark brown, white, two small black buttons Owl hat Scraps of blue, black, white, brown Gauge - Using Light worsted (3) and F hook, 9dc x 4 ½ rows to 2”(5cm)