Penis Size: 6.3 Inches in Context — Average, Percentiles, and Myths

6.3 inches (16 cm) erect length is above average.

Data (Systematic Reviews, Measured Studies)

• Mean Erect Length: 5.1–5.5 inches (13–14 cm)
• Mean Flaccid Stretched: 5.1–5.3 inches
• 6.3 inches ≈ 75th–85th percentile

Measurement Standard

Bone-pressed, along dorsal midline, standing, full erection. Self-reported studies overestimate by 0.5–1 inch.

What Matters More

• Erectile function, ejaculatory control, sensation
• Partner satisfaction (studies: technique, communication > size)
• Body image—many men underestimate themselves

Medical Note

Micropenis: <2.5 inches (2.5 SD below mean)—rare, congenital. Buried penis (obesity, scarring)—treatable. Enlargement surgeries: high complication rates, not recommended by AUA/EAU.