About Cocksure

Most "size" tools are either fear-bait selling pills, or spreadsheets only a statistician could love. Cocksure aims for the gap: accurate, transparent, and genuinely reassuring.

Why it exists

"Am I normal?" is one of the most-Googled questions men have and rarely ask out loud. The honest answer — backed by the largest clinical review to date — is that the normal range is wide and most worry is unfounded.

Our principles

• Private by default. Your numbers stay on your device. Always.
• Show the data. Every figure links to its source on the methodology page.
• No fear-selling. We don't push enlargement products.
• Honest about uncertainty. Where data is weak (country comparisons), we say so.

A note on health

Size anxiety is common. If concern about your body is affecting your wellbeing or relationships, a GP or therapist can help far more than any calculator. This site is educational only.