Boy Measurements 5-18 yrs
From various websites compiled as help for writers of boy erotic stories.
| Age |
HEIGHT
from 5th-95th percentile |
WEIGHT
from 5th-95th percentile |
PENIS SIZE
length - circumference |
| flaccid |
erect |
circ |
| 5 |
1.02 - 1.17 m
3'4" - 3'10" |
15 - 23 kg
33.5 - 51 lbs. |
2.5 - 5 cm
1 - 2" |
5 - 10 cm
2 - 4" |
6.5 cm
2.5" |
| 6 |
1.08 - 1.23 m
3'7" - 4' |
19 - 26 kg
41.5 - 58 lbs. |
| 7 |
1.13 - 1.30 m
3'8" - 4'3" |
18.5 - 30 kg
41 - 66 lbs. |
| 8 |
1.18 - 1.36 m
3'10" - 4'6" |
20.5 - 34.5 kg
45 - 76 lbs. |
| 9 |
1.23 - 1.42 m
4' - 4'8" |
22 - 39.5 kg
49 - 87 lbs. |
| 10 |
1.28 - 1.48 m
4'2" - 4'10" |
24.5 - 45 kg
53.5 - 100 lbs. |
| 11 |
1.33 - 1.55 m
4'4" - 5'1" |
27 - 51.5 kg
59 - 114 lbs. |
7.5 - 9.5 cm
3 - 3.8" |
| 12 |
1.38 - 1.62 m
4'6" - 5'4" |
30 - 58 kg
66 - 128 lbs. |
| 13 |
1.43 - 1.70 m
4'8" - 5'7" |
33.5 - 65 kg
74 - 143 lbs. |
4 - 5 cm
1.5 - 2" | 12.5 cm
5" | 7.5 cm
3" |
| 14 |
1.49 - 1.77 m
4'11" - 5'10" |
38 - 72 kg
84 - 159 lbs. |
5 - 8 cm
2 - 3" | 13.5 cm
5.5" | 8.5 cm
3.5" |
| 15 |
1.55 - 1.82 m
5'1" - 6' |
43 - 79 kg
95 - 174 lbs. |
5 - 10 cm
2 - 4" | 14 cm
5.5" | 10 cm
4" |
| 16 |
1.61 - 1.85 m
5'3" - 6'1" |
47.5 - 85.5 kg
105 - 189 lbs. |
6 - 10 cm
2.5 - 4" | 14.5 cm
5.75" | 10.5 cm
4.25" |
| 17 |
1.65 - 1.87 m
5'5" - 6'2" |
51.5 - 91.5 kg
114 - 201 lbs. |
7.5 - 10 cm
3 - 4" | 14.75 cm
6" | 11 cm
4.5" |
| 18 |
1.66 - 1.88 m
5'5" - 6'2" |
54 - 96 kg
119 - 211 lbs. |
9 - 10 cm
3.5 - 4" | 14.75 cm
6" | 11.75 cm
4.5" |
| adult |
- |
- |
9 - 10 cm
3.5 - 4" | 14 - 16 cm
5.5 - 6.5" | 12.5 cm
5" |
Puberty and ejaculation
The average age to begin puberty is around 13 years-old. However, a boy may start to fully develop at a young age of 10 or 12, also he may not develop until mid teens. Boys would normally first ejaculate between the age of 10 - 14 years.
Tanner scale of physical development of balls and penis
| Stage | Development | Typ. Age |
|---|
| I | Testicular volume less than 1.5 ml; small penis of 3 cm / 1.18" or less (pre-pubertal) | Up to 9 |
|---|
| II | Testicular volume between 1.6 and 6 ml; skin on scrotum thins, reddens and enlarges;
penis length unchanged | 9 - 11 |
|---|
| III | Testicular volume between 6 and 12 ml; scrotum enlarges further;
penis begins to lengthen to about 6 cm / 2.36" | 11 - 12.5 |
|---|
| IV | Testicular volume between 12 and 20 ml; scrotum enlarges further and darkens;
penis increases in length to 10 cm / 3.94" | 12.5 - 14 |
|---|
| V | Testicular volume greater than 20 ml; adult scrotum and penis of 15 cm / 5.9" in length | 14+ |
|---|
Tanner scale of development of pubic hair
| Stage | Development | Typ. Age |
|---|
| I | No pubic hair at all (pre-pubertal) | up to 10 |
|---|
| II | Small amount of long, downy hair with slight pigmentation at base of penis and scrotum | 10 - 11.5 |
|---|
| III | Hair becomes more coarse and curly, and begins to extend laterally | 11.5 - 13 |
|---|
| IV | Adult-like hair quality, extending across pubis but sparing medial thighs | 13 - 15 |
|---|
| V | Hair extends to medial surface of the thighs | 15+ |
|---|
|
Boy Stories