Gestational

Age

Weeks

Weight

Pounds

Total

Height

Inches

Height

Neck to Feet

Inches

Wrist to

Wrist

Inches

Circumference

Inches

Hat Height

Inches

Neck

Chest &

Abdomen

Head

21

up to 1

8 - 11

Not available

Not available

2 - 3

6

Up to Tennis ball size

Not available

24

1.5

13.5

10.5

10.5

3

8

9

= Baseball

3.5

26

2

14

11

10.5

3

8.5

9.5

4

28

2.5

15

12

11

3.25

9.5

10

4

30

3

16

13

11.5

3.25

10.5

10.5

4

32

3.5

17

14

12

3.5

11

11.5

= Softball

4.5

34

4.5

18

14.25

12.5

3.5

12

12.5

4.5

36

5.5

19

14.5

13

4

12.5

13

5

40

Smaller

newborn

6 - 8

20 - 21

14.5

14.25

4.5

13.5

14

5.5

40

Larger

newborn

9 - 11+

21 – 22

17

16

5.5

14.5

15

6