Here is a basic list of measurements to use as a baseline for height, weight and body measurements. These are more-or-less the average measurements for humans by gender and age. Use them as a reference and fudge them up and down as necessary:
Females
| Age |
Height |
Weight |
Chest |
Waist |
Hips |
| 2 |
2'9.5" |
26.5 lbs. |
21 |
20 |
22 |
| 3 |
3'1" |
31.5 lbs. |
22 |
20.5 |
23 |
| 4 |
3'3.5" |
34 lbs. |
23 |
21 |
24 |
| 5 |
3'6.5" |
39.5 lbs. |
24 |
21.5 |
25 |
| 6 |
3'9.5" |
44 lbs. |
25 |
22 |
27 |
| 7 |
3'11.5" |
49.5 lbs. |
26 |
22.5 |
27 |
| 8 |
4'2.5" |
57 lbs. |
27 |
23 |
28 |
| 9 |
4'4.5" |
62 lbs. |
28 |
23.5 |
29 |
| 10 |
4'6.5" |
70 lbs. |
29 |
24 |
30 |
| 11 |
4'8.7" |
81.5 lbs. |
30 |
24.5 |
31 |
| 12 |
4'11" |
91.5 lbs. |
31 |
25 |
32 |
| 13 |
5'1.7" |
101 lbs. |
32 |
25.5 |
33 |
| 14 |
5'2.5" |
105 lbs. |
33 |
26 |
34 |
| 15 |
5'3" |
115 lbs. |
33.5 |
26.5 |
35 |
| 16 |
5'4" |
118 lbs. |
34 |
27 |
36 |
| 17 |
5'4.1" |
120 lbs. |
34.5 |
27.5 |
37 |
| 18 |
5'4.2" |
125 lbs. |
35 |
28 |
38 |
- Add 1 inch to the chest measurement of females with breasts for each cup size. (AA=+.5, A=+1, B=+2, C=+3, D=+4, DD/E=+5, etc.)
Male
| Age |
Height |
Weight |
Chest |
Waist |
Hips |
| 2 |
2'10.2" |
27.5 lbs. |
21 |
21 |
22 |
| 3 |
3'1.5" |
31 lbs. |
22 |
21.5 |
23 |
| 4 |
3'4.3" |
36 lbs. |
23 |
22 |
24 |
| 5 |
3'7" |
40.5 lbs. |
24 |
22.5 |
25 |
| 6 |
3'9.5" |
45.5 lbs. |
25 |
23 |
26 |
| 7 |
4'0" |
50.5 lbs. |
26 |
23.5 |
27 |
| 8 |
4'2.5" |
56.5 lbs. |
27 |
24 |
28 |
| 9 |
4'4.5" |
63 lbs. |
28 |
24.5 |
29 |
| 10 |
4'6.5" |
70.5 lbs. |
29 |
25 |
30 |
| 11 |
4'8.5" |
78.5 lbs. |
30 |
25.5 |
31 |
| 12 |
4'10.7" |
88 lbs. |
31 |
26 |
32 |
| 13 |
5'1.5" |
100 lbs. |
32 |
26.5 |
33 |
| 14 |
5'4.5" |
112 lbs |
33 |
27 |
34 |
| 15 |
5'7" |
123 lbs. |
33.5 |
27.5 |
35 |
| 16 |
5'8.5" |
135 |
34 |
28 |
36 |
| 17 |
5'9" |
142 lbs. |
34.5 |
28 |
37 |
| 18 |
5'9.5" |
152 |
35 |
29 |
38 |