"Average size" varies greatly depending on what is being measured (height, weight, clothing, household, house size) and where (country, age), but generally, average adult height in many Western countries is around 5'9" for men and 5'3" for women, with US average weights around 200 lbs (men) and 170 lbs (women), while average Australian women wear size 16, and households average around 2.5 people.
Key Takeaways
The average height for an adult male in the United States is 5 feet, 8.9 inches. The average weight for adult males is 199 pounds, which results in a BMI of 30.4, categorizing them as obese. The average body fat percentage in adult males in the United States is estimated at 27.8%.
The average penis size in the Australiais 13.21cm (5.2in). Australians may be delighted to learn that Aussie men are decidedly, well – average – when it comes to penis size.
Average Weight and Body Mass Index
Recent data from the Centers for Disease Control (CDC) suggests that the average weight of men in the US is 199.8 pounds. The average weight for women is 170.8 pounds. To put this in perspective, it's important to consider body mass index (BMI).
Average Body Size in North America
In North America, particularly in the United States, the average female height is approximately 5'4'' (162.5 cm), and the average weight is around 170 to 180 pounds (77-82 kg).
Average Size & Variation
Other trusted sources place it in the range of 5.1 to 5.5 inches (13.0 – 14 cm) when erect. Because measurements vary, nearly 68% of men fall within the mid-range (4.6 to 6.0 in) when erect. Lower and higher extremes (below 9.7 cm or above 17.5 cm) are far less common.
What is the average penis size? According to research, the average penis size is around 5 inches. But let's dig a little deeper into these findings. In 2025, researchers looked through 33 studies on penis size, with data on over 36,000 men from around the world.
Average penis size for an adult man is about 5.16 inches (13.12cm) long, when erect, with a girth of about 4.59 inches at the widest part (11.66cm).
Puberty - Increased hormones in a child's body during puberty (between the ages of 10 and 14 for girls and between the ages of 12 and 16 for boys) leads to growth and possible expansion of “baby fat” areas.
At age 17, your son is about to start the last stage of their adolescence, that phase between childhood and adulthood. But they are still growing -- literally. Males keep getting taller into their early 20s. Here are some other things you can expect as your teen crosses the final threshold into manhood.
A weight of 42 kg (about 92.6 lbs) typically corresponds to a child around 12 years old, often a female, but it can vary significantly with height, sex, and individual growth patterns; it's the average for a 12-year-old female according to some data, while for boys, it might be closer to 10-11 years old, and for younger children, it's much older, showing the importance of growth charts.
The average erect penis length (using clinical measurements, not self-reports) generally falls between 5.1 to 5.7 inches (12.95 to 14.5 cm), with girth averaging around 4.5 to 5.1 inches (11.3 to 13 cm), though studies vary slightly, and many men overestimate the average size, with self-reported data inflating perceptions.
The average size
According to Professor Joachim Osur, a reproductive and sexual health expert, the correct penile size is usually measured on erect manhood. Twelve and a half centimetres or 4.9 inches, to 19.1 centimetres or 7.5 inches, is the normal size for adult men.
In general, smaller flaccid penises lengthen at erection by a greater percentage than larger flaccid penises, with most men reaching an average size of 5 to 7 inches when erect.
At the time of their measurement, some men were with partners or "a friend," although most employed a DIY method for attaining an erection. Not surprisingly, penises come in all shapes and sizes. The smallest erect penis in the study was about 1.6 inches (4 cm) long, and the largest was 10.2 inches (26 cm) long.
It is important to note that height and penis size are not directly related. Studies have shown that there is no significant relationship between the two. The size of a man's penis is not directly correlated with his height. Penis size can vary significantly among individuals regardless of their height.
"Big" for a man is subjective and context-dependent (clothing, health, physique), but generally means sizes beyond standard large, like XL and above (XL chest 46-48"+), often with taller measurements, or physiques with larger shoulders/waists (waist over 37" for health), with "big" often referring to being significantly larger than average in height, width, or muscle mass.
Average penis sizes around the world
Flaccid circumference/girth was between 9 to 10 centimetres (3.5 to 3.9 inches) when flaccid. When Erect the average length ranged from 12 to 16 centimetres (4.7 to 6.3 inches). When erect the circumference was around 12 centimetres (4.7 inches).
Well, as observed in the calculations, women having the size as 18-20 come into the plus-size category. Anything above L-size is considered to be plus-size in women's clothing. However, always remember to check the brand's personal sizing chart as it will give you accurate information on the same.
At 2 years old, your toddler is growing, growing, grown — to a length that just might predict her future height. Most 2-year-old girls weigh 19½ to 32½ pounds and measure 31½ to 36½ inches tall. Boys typically weigh 21 to 33½ pounds and measure 32 to 37 inches tall.