


29.5% had neutral feelings about their size, being neither particularly satisfied nor dissatisfied. Overall, very few men reported dissatisfaction with their size – only 10.3% said they were dissatisfied, and a mere 1.7% said they were very dissatisfied. In this uncertain environment, how do men actually feel about their own size? We asked men from four age groups to state their level of satisfaction with the size of their genitals. Ideas of typical penis size vary greatly around the world and even within individual countries like the U.S. And in the United States, these guesses were the furthest apart – while Americans estimated an average length of 14.3 cm, their concept of an ideal length was much greater at 17 cm. These estimates were the closest in the Netherlands: This country’s ideal length, 15.1 cm, was only 1.1 cm longer than their perception of the average length.

One theme was universal among the countries we studied: In each one, the ideal length endorsed by our respondents outpaced perceptions of the typical size, again showing how many people believe that even average genitals may not be “big enough.” However, the gap between notions of average size and ideal size varied substantially. Not every country offered such dramatically high guesses – the United Kingdom had both the lowest estimate of average size, 12.4 cm, and the lowest ideal length, 14.2 cm. Austria took second for estimates of average length (15.6 cm) but held the top spot for estimates of ideal size (17.6 cm). Out of the nations we studied, Poland had the highest estimate of average length at 15.7 cm, and the second-highest ideal length of 17.3 cm. We then posed the same questions to men and women in nine European countries as well as the United States, and we found massive variations in ideas of average and optimal penis size around the world. Yet men may be evaluating themselves even more harshly: Despite having an estimate of average size that’s similar to women’s, they believe the ideal penis is 2.5 cm longer. While it’s concerning that even an average penis size is seen as less than ideal, it’s unclear whether a difference of only 2 cm would have a meaningful effect on sexual satisfaction for a man or his partner. Women’s perception of an ideal penis length was 2 cm greater than the average length. When considering notions of an ideal length, it becomes clear that expectations don’t always match up with reality. Compare this to the results of a 2015 review of studies on penis size that included over 15,000 men from around the world: the average penis length when erect was found to be 13.12 cm – almost one whole centimeter less than the average estimate given by men in our study. When it comes to perceptions of average size, men and women have very similar ideas: Women estimated the average penis length to be 13.8 cm, and for men, this was only 0.3 cm greater. It’s important to note that estimates of average size may not reflect the reality of penis size, as many people don’t necessarily have an accurate idea of which sizes are typical. We first asked men and women to offer their estimates of what the average penis length is, as well as what they consider to be an ideal length. Two elements play a key role in concern over penis size: how big someone thinks a penis is, and how big they think it ought to be.
