The average clitoris is far larger than most people realize. The visible part, the glans, is roughly 1 to 1.5 centimeters long and about half a centimeter wide. But that’s only the tip. MRI imaging shows the full clitoral structure, most of which sits inside the body, averages about 11.6 centimeters in total length, or roughly 4.5 inches.
The Visible Part: The Clitoral Glans
The glans is the small, rounded portion visible at the top of the vulva, partially covered by a fold of skin called the clitoral hood. Measurements vary across studies, but the glans typically falls in the range of 5 millimeters to about 1.5 centimeters in length. One set of measurements placed the average longitudinal diameter at about 5.1 millimeters and the transverse (side to side) width at about 3.4 millimeters, though other studies report slightly larger figures. This variation is normal. Just like noses or earlobes, clitoral glans size differs meaningfully from person to person.
Despite its small size, the glans is extraordinarily sensitive. A 2022 micro-dissection study from Oregon Health & Science University counted more than 10,000 nerve fibers in the human clitoral dorsal nerve alone, about 20% more than the frequently cited estimate of 8,000, which was actually derived from livestock research, not humans. The clitoris also has additional smaller nerves beyond the dorsal nerve, making the true total even higher.
The Internal Structure Is Much Larger
Beneath the surface, the clitoris extends deep into the pelvis in a wishbone-like shape. The full organ has several parts: the glans (external), the body or shaft, two legs called crura that angle backward along the pubic bone, and two vestibular bulbs that flank the vaginal opening. All of these structures are made of erectile tissue, the same type found in a penis.
The clitoral crura average about 42.3 millimeters in length (roughly 1.7 inches) on each side. Combined with the clitoral body, the total internal length of the body and crura alone averages 10.3 centimeters. Adding the glans brings the full average to about 11.6 centimeters, based on MRI measurements. The vestibular bulbs add further volume, averaging about 4,685 cubic millimeters of tissue, nearly double the volume of the crura themselves (about 2,515 cubic millimeters).
This internal anatomy wasn’t well mapped until the late 1990s and early 2000s, when urologist Helen O’Connell published detailed dissection studies showing the clitoris was significantly larger and more complex than medical textbooks had depicted for over a century.
How Size Changes During Arousal
Like a penis, the clitoris engorges with blood during sexual arousal. MRI studies have measured an average increase of 110% in clitoral volume during arousal, meaning the organ roughly doubles in size. Individual variation is substantial. In one study of eight subjects, the volume increase ranged from 58% to 274%, with one participant’s clitoris nearly quadrupling. This engorgement affects the entire structure, not just the visible glans, which is why arousal creates sensations that feel deeper than the surface.
How Size Changes With Age
Clitoral anatomy shifts across the lifespan. After menopause, declining levels of estrogen and progesterone cause changes throughout the urogenital area. The tissues around and within the clitoris can thin, and the organ may become somewhat smaller over time. This is part of a broader pattern called urogenital atrophy that also affects vaginal tissue. For some people, these changes alter sensation during sexual activity, occasionally making stimulation that was once pleasurable feel uncomfortable or even painful. Hormonal treatments can sometimes help, but the clitoris itself doesn’t disappear with age.
Research using MRI has also found that the crura and vestibular bulbs show measurable volume differences across age groups, suggesting the internal structures gradually lose some tissue density as hormone levels decline.
What Counts as a Typical Range
There is no single “correct” size. The glans alone can range from a few millimeters to well over a centimeter, and internal dimensions vary just as widely. Clinically, an unusually large clitoral glans (called clitoromegaly) is generally flagged only when the width exceeds about 5 millimeters in children under three or 6 millimeters in children ages four to eight. In adults, clitoromegaly is rare and typically linked to hormonal conditions that increase androgen levels, such as certain adrenal or ovarian disorders. If you’ve never had symptoms or hormonal issues, your size almost certainly falls within normal variation.