Grower and Shower

What Is a "Grower"?

A "grower" is the colloquial term for a penis that appears relatively small in the flaccid state but increases significantly in size during an erection. The increase in size is often double the starting measurement, or more.

The blood that flows into the erectile bodies during sexual arousal causes both the stiffening and the marked increase in size of the penis.

What Is a "Shower"?

A "shower" describes the opposite: this type of penis is already relatively large in the flaccid state and barely increases in size during an erection. Here, the incoming blood produces only the stiffening, without a substantial change in size.

Grower vs. Shower: The Key Differences at a Glance

Flaccid size does not allow any reliable conclusion about actual size during an erection.

How Do I Know Which Type I Am? The 4 cm Rule

A scientific boundary between the two types was proposed in a 2018 study published in the International Journal of Impotence Research: if the penis grows by more than 4 cm during an erection, it is classified as a grower; if it grows by less than 4 cm, as a shower. This threshold serves as a rough guideline, not an absolute medical category.

How Common Are Growers and Showers? What the Studies Say

How common each type actually is in the general population has not been reliably established scientifically. The only clinical study on the subject — Yafi et al., 2018, in the International Journal of Impotence Research — examined exclusively men with erectile dysfunction and found 26% growers and 74% showers. However, these figures cannot be applied to healthy men: since younger men in the study were more often growers, while older men are disproportionately represented in ED clinics, the distribution in this sample is systematically skewed.

European surveys, by contrast, report figures of up to 80% growers — though without representative methodology. Both figures should therefore be interpreted with caution. Reliable population-level data are still lacking.

Is Being a Grower Normal or a Medical Issue?

No, being a grower is neither pathological nor in need of treatment. Both variants — grower and shower — are entirely normal. The cause lies in genetics: the number and structure of collagen fibres in penile tissue determine how elastic the tissue is — and, with it, how much the penis grows during an erection. Both are determined from birth and are hereditary.

Neither the grower nor the shower type:

• negatively affects sexual function,
• impairs fertility,
• is associated with erectile dysfunction,
• occurs as a consequence of prostate conditions.

Does the Type Matter During Sex?

No — at least not in the way many people think. What matters for a fulfilling sex life is erection quality, control and stamina, not the type. Since growers and showers are often barely distinguishable once erect, flaccid size is simply irrelevant to sexual performance.

Grower or Shower – Which Is More Attractive?

From a purely visual standpoint, a shower initially draws more attention in the flaccid state. This is because a penis that already appears larger instinctively signals mating readiness, which can influence the perception of male attractiveness.

Experienced partners know, however, that flaccid size says nothing about actual size during an erection. Growers and showers are often barely distinguishable once erect.

What Can I Do If Being a Grower Bothers Me?

If a grower's flaccid size feels too small and causes psychological distress, a professional penis enlargement is an option.

A penis enlargement does not change the type — a grower does not become a shower. The procedure enlarges the penis overall, so that it is larger both in the flaccid and in the erect state. Grower and shower are two genetically determined types that cannot be converted into one another.

Can the Type Change with Age?

Some sources claim that a grower can turn into a shower over the course of a lifetime. This claim should, however, be viewed critically.

The only relevant study on the subject was published in 2018 in the International Journal of Impotence Research — based on data from just 274 men, all of whom had erectile dysfunction. That is not a representative basis for a general statement about healthy men.

What actually happens physiologically: with age, penile tissue loses elasticity, and the collagen content of the tissue changes. This can cause erections to become less firm, or the penis to appear somewhat smaller in the flaccid state. This is not a change of type, however, but a normal ageing process that affects erection quality — not the genetically determined type of the penis.

Solid evidence that a grower turns into a shower is lacking. What changes is erection quality — not the underlying type.

Frequently Asked Questions (FAQ)

Can a grower be turned into a shower?

No. Both types are genetically determined and cannot be converted. A penis enlargement enlarges the penis overall but does not change the way it changes in size during an erection.

How do I know if I'm a grower or a shower?

As a rough rule of thumb: if the penis grows by more than 4 cm during an erection, it is a grower; if it grows by less than 4 cm, it is a shower.

What proportion of men are growers?

This has not been reliably established scientifically. The only clinical study (Yafi et al., 2018) examined exclusively ED patients — a skewed sample that does not allow conclusions about the general population. European surveys cite figures of up to 80% growers, but representative evidence is lacking for both figures.

Does the type affect sex?

No. What matters is erection quality, control and stamina — not the type. Growers and showers are barely distinguishable once erect.

Does a grower turn into a shower with age?

Not in the true sense. The genetically determined type does not change. What can change with age is erection quality — tissue loses elasticity and collagen content changes. This affects the firmness and size of the erection, but is not a change of type.