Common Penis Size Questions & Guides
Start with the questions people most often have about measurement, averages, girth, percentiles and condom sizing. Each guide explains the available evidence, its limitations and where to go next.
Average size and what is normal
Published studies report averages, but an average does not define what is normal for an individual. Start with the average-size research and read how different studies measure length and circumference.
Measurement and comparison
Consistent technique matters. Learn how erect length and circumference are measured, why bone-pressed and non-bone-pressed methods differ, and why small differences between repeated measurements may not be meaningful.
Girth and condom sizing
Girth is circumference around the shaft. It can help identify a starting condom width, but fit also depends on product design, material and manufacturer specifications.
Use the free calculator
After reading the measurement guidance, enter your own measurements into the calculator to see separate estimated length and girth percentiles. Results are informational estimates, not medical assessments.
My Size Report provides a private, calculator-led way to understand measurements against published research. Results are informational and should not be treated as medical advice.