Size chart

Birth weeks	Size baby	Weight baby	Size hat	Size Clothing
<20 weeks	<25 cm	<320 grams	17 cm	20-25 cm
20 weeks	25 cm	305 grams	17 cm	20-25 cm
21 weeks	27 cm	390 grams	17 cm	25-30 cm or 1-2 lbs
22 weeks	28.5 cm	460 grams	20 cm	25-30 cm or 1-2 lbs
23 weeks	30 cm	550 grams	20 cm	25-30 cm or 1-2 lbs
24 weeks	31 cm	640 grams	24 cm	30-35 cm or 1-2 lbs
25 weeks	32 cm	730 grams	24 cm	30-35 cm or 1-2 lbs
26 weeks	33 cm	800 grams	24 cm	30-35 cm or 1-2 lbs
27 weeks	34 cm	870 grams	25 cm	30-35 cm or 1-2 lbs
28 weeks	35 cm	960 grams	25 cm	35-38 cm or 2-3 lbs
29 weeks	37.5 cm	1100 grams	26 cm	35-38 cm or 2-3 lbs
30 weeks	38 cm	1250 grams	28 cm	38 cm or 2-3 lbs
31 weeks	39 cm	1450 grams	29 cm	38 cm or 2-3 lbs
32 weeks	40 cm	1650 grams	30 cm	40 of 3-5 lbs
33 weeks	41.5 cm	1900 grams	31 cm	42 of 3-5 lbs
34 weeks	43 cm	2150 grams	31 cm	42 of 3-5 lbs
35 weeks	44 cm	2400 grams	33 cm	44 of 3-5/5-8 lbs
36 weeks	45 cm	2650 grams	33 cm	44 of 3-5/5-8 lbs
37 weeks	46.5 cm	2850 grams	33 cm	46 of 5-8 lbs
38 weeks	48 cm	3100 grams	34 cm	48 of 5-8 lbs
39 weeks	49 cm	3300 grams	34 cm	50 of 5-8/8-12 lbs
40 weeks	50 cm	3450 grams	35 cm	50 of 5-8/8-12 lbs