these measurements are the sizes I used for all my baby patterns size ID; size chestsize waist hip armlength 10 lbs 4.5 kg 62/3 months 46 cm/18 in 46 cm/18 in 48 cm/19 in 15.2 cm/6 in 18 lbs 8.2 kg 74/6 months 51 cm/20 in 48 cm/19 in 51 cm/20 in 16.5 cm/6.5 in 24 lbs 11 kg 80/9 months 56 cm/22 in 51 cm/20 in 53 cm/21 in 17.8 cm/7 in SIZES IN INCHES baby weight 10 lbs 18 lbs 24 lbs baby age 0 months 6 months 12 months **************************************************************** chest 18 20 22 waist 18 19 20 hip 19 20 21 ****************************************************************** back with 7.5 7.75 8.25 arm length 6 6.5 7 neck to waist 7 7.5 8 ****************************************************************** waist to hip 3 3.4 3.9 waist to knee 8.5 10 11 waist to ankle 14 16 19 ****************************************************************** armhole depth 3.25 3.5 3.75 upper arm 4.5 5 5.5 wrist 3.5 4 4.5 ****************************************************************** head circumference 15 16 17 neck width 4 4.1 4.3 neck depth 1.75 1.8 1.9 ***************************************************************** body rib 1.5 1.5 1.5 neck rib 0.7 0.7 0.7 ****************************************************************** ease factor 1 1 1 ****************************************************************** SIZES IN CMS baby weight 4.5 kg 8.2 kg 11 kg baby age 0 months 6 months 12 months European size 62 74 80 ****************************************************************** chest 46 51 56 waist 46 48 51 hip 48 51 53 ****************************************************************** back with 19.1 19.7 21 arm length 15.2 16.5 17.8 neck to waist 17.8 19.1 20.3 ****************************************************************** waist to hip 7.5 8.7 10 waist to knee 21 25 28 waist to ankle 35 41 47 ****************************************************************** armhole depth 8.3 8.9 9.5 upper arm 11.4 12.7 14 wrist 8.9 10.2 11.4 ****************************************************************** head circumference 38.1 40.6 43.2 neck width 10.2 10.4 10.9 neck depth 4.4 4.6 4.8 ****************************************************************** body rib 3.8 3.8 3.8 neck rib 1.8 1.8 1.8 ****************************************************************** ease factor 2.5 2.5 2.5 copyright jessica tromp www.jessica-tromp.nl  US METRIC needle size st x rows = needle size (mm)  0 2 mm 8 x 12 10  1 2.5 mm 10 x 14 8  2 2.75 mm 12 x 16 7  3 3.25 mm 14 x 19 6.5  4 3.5 mm 16 x 22 6  5 3.75 mm 18 x 24 5.5  6 4 mm 20 x 26 5  7 4.5 mm 22 x 29 4.5  8 5 mm 24 x 32 4  9 5.5 mm 26 x 34 3.5 10 6 mm 28 x 37 3 11 6.5 mm 13 8 mm 15 10 mm 17 12.75 mm 19 15 mm pattern sizes from www.jessica-tromp.nl