The entire clitoris is about 3.5 to 4.25 inches long and roughly 2.5 inches wide. That surprises most people, because the only part visible from the outside, the glans, is about half an inch wide and just over half an inch long. The rest of the organ extends inside the body, wrapping around the vaginal canal in a wishbone-like shape.
What You See vs. What’s Inside
The small, rounded nub at the top of the vulva is the glans. One study of 200 premenopausal women measured the glans at an average of about 5 millimeters long and 3.4 millimeters across, though other clinical references put it closer to 1 to 1.5 centimeters in length. That variation is normal. The glans sits under a fold of skin called the clitoral hood, which partially or fully covers it depending on the person.
But the glans accounts for only about 10 percent of the total structure. The other 90 percent is internal: a shaft (called the body) extends inward from the glans, then splits into two legs (called crura) that stretch back along either side of the vaginal opening. Paired bulbs of erectile tissue sit beneath the labia and flank the vaginal canal. Together, these internal structures form a complex roughly the size of a medium finger.
How Size Changes During Arousal
The clitoris is made of erectile tissue, the same type found in the penis. During arousal, blood flows into these tissues and the entire structure swells. The visible glans can grow anywhere from 50 to 300 percent larger, often pushing out from under the hood. The internal bulbs and legs also engorge, which is part of why pressure and stimulation inside the vagina can feel pleasurable. This engorgement is essentially a clitoral erection, even though most of it happens out of sight.
How Size Changes With Age
The clitoris doesn’t stay the same size throughout life. Research using MRI scans has found that the clitoral body tends to get slightly shorter with age, and the surrounding vestibular bulbs shrink and shift position over time. The overall volume of the clitoris itself, interestingly, stays relatively stable. What changes more noticeably is the tissue around it.
After menopause, dropping levels of estrogen and progesterone cause the tissues of the vulva and vagina to thin, a process called urogenital atrophy. The same thinning happens around the clitoris, which can alter sensation during sexual activity. For some people, the clitoris feels less responsive; for others, thinning tissue actually makes it hypersensitive, sometimes uncomfortably so. These changes don’t mean the clitoris disappears or stops functioning. It remains responsive to stimulation throughout life.
Why the Full Size Was Unknown for So Long
For most of medical history, anatomy textbooks either ignored or dramatically underrepresented the clitoris. It wasn’t until 2005 that urologist Helen O’Connell published detailed MRI-based anatomy showing the full internal extent of the organ. Her work demonstrated that the clitoris was far larger and more complex than previous anatomical descriptions suggested. Prior dissection studies had often damaged or overlooked the internal structures because the erectile tissue collapses after death and is difficult to trace without imaging.
O’Connell’s research also clarified that the vestibular bulbs, previously classified as a separate structure, are closely connected to the clitoris and function as part of the same erectile system. This redefined understanding of how the clitoris contributes to arousal and sensation, both externally and internally.
Wide Range of Normal
There is no single “correct” clitoral size. The glans alone varies considerably from person to person, ranging from a few millimeters to over a centimeter in length. Hormonal differences, genetics, and age all play a role. Newborns have a measurable clitoral length averaging about 6 millimeters, which grows through puberty as hormone levels rise. In adults, the total internal length falls in that 3.5 to 4.25 inch range for most people, but individual variation is wide and has no bearing on sexual function or health.
Size also doesn’t correlate with sensitivity in any straightforward way. The glans alone contains around 8,000 nerve endings packed into a very small area, making it the most nerve-dense structure in the human body regardless of its dimensions. Whether someone’s glans is on the smaller or larger end of the spectrum, the density of nerve endings remains high.