Article
Men and Penis Size
Most New Zealand men who come to us have an average-size penis. This is an honest, evidence-based look at what “normal” really means, what partners actually prefer, and the psychology worth understanding before you decide anything.
What's normal
You are almost certainly normal.
The single largest study of its kind pooled measurements — all taken by health professionals, never self-reported — from up to 15,521 men worldwide. It found that the average erect penis is about 13.1 cm long and 11.7 cm in circumference, and it produced the reference ranges (“nomograms”) that quietly power our girth estimator. Its headline conclusion was reassuring: the vast majority of men who worry they are small are, in fact, entirely normal.
Veale D, Miles S, Bramley S, Muir G, Hodsoll J. Am I normal? A systematic review and construction of nomograms for flaccid and erect penis length and circumference in up to 15,521 men. BJU International 2015; 115(6):978–986. PubMed
Men choose girth enhancement to increase self-confidence or as an ego boost — and, as the data shows, may not have a small penis at all. If you would simply enjoy a larger penis, you are in the majority: most men would. But it is a personal decision, and Dr Anderson will always give you an honest assessment of whether a procedure is likely to help you.
The psychology
The gap is often between the ears.
Here is the finding most men find genuinely useful. In a survey of more than 52,000 heterosexual men and women, 85% of women said they were satisfied with their partner's size — but only 55% of men were satisfied with their own. In other words, the dissatisfaction is disproportionately in the man's head, not in his partner's assessment. A separate validated study of men ashamed of their size found their distress was driven far more by belief and comparison — usually against pornography or locker-room memory — than by any measured shortfall.
Why does this matter? Because if the discomfort is really about confidence rather than centimetres, three things tend to help before, or instead of, any procedure: getting an objective measurement against real reference ranges (most men are relieved); understanding that flaccid size is a poor guide to erect size, which is what counts; and choosing a reversible option — dissolvable filler — so the decision never feels irreversible. When men do proceed, the reported benefit is most often psychological: confidence, not conquest.
Lever J, Frederick DA, Peplau LA. Does size matter? Men's and women's views on penis size across the lifespan. Psychology of Men & Masculinity 2006; 7(3):129–143. · Veale D et al. Beliefs about penis size: validation of a scale for men ashamed about their penis size. Journal of Sexual Medicine 2014; 11(1):84–92.
Girth vs length
Why girth is the lever.
When women's preferences are measured directly rather than asked about, girth tends to matter more than length. In a well-designed study, women selected among 33 physical (3D-printed) models and, on average, chose penises slightly larger in girth than the population average — and preferred marginally larger dimensions for a one-time partner than for a long-term one. Girth is precisely what dermal filler provides; length gains are not something filler can honestly deliver.
Prause N, Park J, Leung S, Miller G. Women's preferences for penis size: a new research method using selection among 3D models. PLoS ONE 2015; 10(9):e0133079. PubMed
A word on partners
Consider compatibility.
For those in long-term relationships, it's worth considering your partner's preference. Incompatibility in size can be a genuine source of dissatisfaction — but so can an unwanted change. If your partner prefers a smaller or thinner penis, a girth increase may not be advisable. One advantage of reversible filler is that, unlike surgery, the result can be dissolved if it isn't right for you both.
Interesting studies
The research, in brief.
Am I normal? Nomograms for flaccid & erect penis dimensions
The study that powers our estimator. Pooled clinician-taken measurements from up to 15,521 men to build population reference ranges — a reassuring, evidence-based answer to “what's normal?” and the basis for reassuring men worried they are small.
Read the study →Does size matter? Men's and women's views across the lifespan
Survey of over 52,000 adults. 85% of women were satisfied with their partner's size, versus only 55% of men satisfied with their own — the clearest evidence that size anxiety is largely self-generated.
Read the study →Women's preferences for penis size, using 3D models
Rather than asking, researchers let women select among physical 3D-printed models. Preferences clustered slightly above average, with girth carrying real weight — and marginally larger dimensions preferred for a one-time than a long-term partner.
Read the study →Penis size interacts with body shape and height to influence attractiveness
An Australian study using computer-generated figures found flaccid penis size did influence female attractiveness ratings — but never in isolation: it interacted with height and shoulder-to-hip ratio, and returns diminished. Size is one signal among many, not the whole picture.
Read the study →Next
If you're considering it.
Learn how the treatment works on our Androfill penis fillers page, or estimate your result with the how much filler tool.
Talk to a doctor honestly.
A private, judgement-free consultation with Dr Anderson — across New Zealand.
About this page
Last reviewed on 28 July 2026.
Written and medically reviewed by Dr Brent Anderson (MBChB), Fellow of the New Zealand Society of Cosmetic Medicine, who leads Androfill in New Zealand.
Information on this page is drawn from the published literature on hyaluronic-acid penile filler and from Androfill’s clinical experience since 2012. It is general information, not a substitute for a consultation — your own suitability, options and risks must be assessed in person by your doctor.