According to a 2024 meta-analysis published in the NIH, the average penile dimensions for Chinese men are 7.42 cm (2.92 inches) for flaccid length and 12.42 cm (4.89 inches) for erect length.
Infographic : Average Erect Penis Size Around the World
*Nomograms are a pictorial representation of a complex mathematical formula. 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.
It's penis size. According to the latest, most comprehensive study to date using 500,000 males, the average length of a Japanese male's erection is 13.56 centimeters (5.33 inches), with a diameter of 3.53 cm (1.39“) at the head and 3.19 cm (1.25”) at the shaft, writes Tokyo Reporter.
It takes 3.6 inches from the root of the penis to the tip of the glans to hit the 50th percentile for flaccid length. That means 68 percent of men measure between 3 and 4.2 inches, and 95 percent are in the 2.4- to 4.8-inch range.
Over all countries, the average size of a penis is about 13.59 cm. The longest ones are 17.61 cm long on average and carried by men in Ecuador.
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.
"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.
5 inches is the average, 5.5 is above the average, 6.0 is large, 6.5 is huge, 7 is tablet.
What's considered "small" is subjective, and what matters most is whether your penis functions properly during sex. Here's a reality check: Most men are within the average range. Studies show that erect penis size for adult men typically falls between 4.5 and 6.0 inches.
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.
Based on these studies, the average length of an erect penis is between 5.1 and 5.5 inches (12.95-13.97 cm), but after taking volunteer bias into account, it is probably toward the lower end of this range. Studies show that a majority of men wish they were larger, with some choosing penile lengthening surgery.
While results vary slightly across reputable studies, the consensus is that the mean human penis, when erect, is in the range 5–6 in (13–15 cm) in length.
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).
Studies suggest that taller men may, on average, have slightly larger penises than shorter men, but height alone is not a reliable way to predict penis size.
Average male sizes vary by country, but in the U.S., men are around 5'9" (69 inches) tall and weigh about 199 lbs with a 40.6-inch waist; globally, heights range, with taller averages in Europe (e.g., Netherlands) and shorter in parts of Asia and South America, highlighting factors like genetics and nutrition. Clothing sizes like Medium often target heights of 5'9" to 5'11", but proportions differ, so checking specific size charts for chest, waist, and inseam is essential.
The study participants preferred, on average, an erect length of 6.3 inches and girth of 4.8 inches for a long-term partner (compared to the slightly larger preference of 6.4 inches in length and 5 inches in girth for a one-time partner).
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.
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.
Perhaps more interesting is the narrow distribution of erect penis size. Most men are remarkably close to each other: 4.7 inches is in the bottom 25 percent, and 5.6 inches is at the top 25 percent. Very few people — those within the top 1 percent — reach 9 inches.
An erection can last anywhere from a few minutes to a few hours. There isn't really an average time for how long an erection should last. In general, though, the average amount of time a person has an erection during sexual intercourse before they ejaculate is about seven minutes.
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).
For a 25-year-old male, average erect penis length typically falls between 5.1 to 6.6 inches (13-17 cm), with girth averaging around 4.5 to 4.7 inches, though studies vary, and many men overestimate the average size, leading to size myths. Most men reach adult size by their late teens, and individual size can vary greatly without affecting function or satisfaction.