The visible part of the clitoris is a small, rounded nub of tissue located at the top of the vulva, just above the urethral opening where the inner lips (labia minora) meet. It’s roughly the size of a pea or small eraser tip in most people, though size varies widely. What you can see externally, however, is only a fraction of the full structure, which extends several inches inside the body.
The External Anatomy
The part you can see or feel is called the glans. It sits beneath a small fold of skin called the clitoral hood (or prepuce), which works much like a foreskin. In some people the hood covers the glans almost entirely, while in others the glans peeks out noticeably. The tissue of the glans is typically pink to dark pink, though the color varies with skin tone and can range from light to deep brown or reddish-purple.
The glans connects to a short, firm ridge just beneath the skin called the shaft (or body). You can sometimes feel the shaft by pressing gently above the glans. It runs about an inch upward toward the pubic bone before diving deeper into the body. Together, the glans, hood, and visible portion of the shaft make up the external clitoris.
The Larger Internal Structure
MRI research led by urologist Helen O’Connell fundamentally changed how scientists understand this organ. Imaging revealed that the clitoris is a large, three-dimensional structure that wraps around the vaginal canal. It cannot be accurately represented in a single flat diagram, which is why older anatomy textbooks got it so wrong for so long.
Internally, the shaft splits into two legs (called crura) that extend backward along either side of the pubic bone, anchoring the clitoris to the pelvis. Below these legs sit two bulbs of erectile tissue that flank the vaginal opening. The bulbs, the legs, and the shaft are all part of the same organ. In total, the internal clitoris is roughly 3 to 4 inches long, though this varies between individuals. The whole structure has a broad attachment to the pubic arch and connects through supporting tissue to the mons pubis and labia.
How It Compares to the Penis
The clitoris and penis develop from the same embryonic tissue. Their structures are direct parallels: the erectile tissue inside the clitoral shaft corresponds to the erectile tissue inside the penile shaft, the clitoral bulbs correspond to the spongy tissue surrounding the urethra in the penis, and the glans of the clitoris is the equivalent of the penile glans. Despite being much smaller externally, the clitoris has a dramatically higher concentration of nerve fibers. Histological studies have found the nerve density in the clitoris to be 6 to 15 times greater than that of the penis, which is why such a small area of tissue produces such intense sensation.
Size and Normal Variation
There is no single “normal” appearance. The visible glans typically measures around 3 to 7 millimeters across in adults, but some are smaller and others are noticeably larger. Research on clitoral size has found that even medical professionals don’t use uniform criteria, and similar measurements can be perceived as either typical or large depending on the observer. In clinical settings, a clitoral length above 10 millimeters is sometimes used as a threshold for further evaluation, but this is a rough guideline, not a firm cutoff.
The clitoral hood varies just as much. Some hoods are thin and tight against the body, others are fuller with extra folds of tissue. The inner labia, which connect to the hood on either side, also come in a wide range of shapes, sizes, and symmetries. Asymmetry is common and completely typical.
How It Changes During Arousal
The clitoris is made of erectile tissue, meaning it fills with blood and swells during sexual arousal. When this happens, the glans becomes more prominent, firmer, and often darker in color as blood flow increases. The internal bulbs and legs also engorge, which contributes to the feeling of fullness or warmth in the vulvar area during arousal.
In a non-aroused state, the smooth muscle tissue in the clitoris stays contracted, keeping blood flow low and the structure relatively soft and small. During stimulation, the body releases chemical signals that relax the smooth muscle in the clitoral arteries, allowing blood to rush in and the tissue to swell. This is the same basic mechanism that produces an erection in the penis.
Changes Over a Lifetime
The clitoris changes with age and hormonal shifts. During puberty, increased estrogen drives growth in genital tissue. Throughout the reproductive years, clitoral blood flow and sensitivity fluctuate with the menstrual cycle, and research shows a measurable relationship between estrogen levels and clitoral volume even on a month-to-month basis.
After menopause, falling estrogen levels can lead to noticeable changes. The tissue may become paler, thinner, and less responsive to touch and pressure. The clitoral hood can shrink or retract, and the surrounding tissue often becomes more fragile. Blood flow to the area decreases, which can reduce engorgement during arousal and slow the time it takes for the clitoris to respond to stimulation. In some cases, this process leads to visible atrophy where the clitoris appears smaller and the tissue looks pale and thinned. Topical estrogen treatments can help restore vascular function and tissue health in these situations.