Finding the right condom size is crucial for both comfort and effectiveness. A condom that's too tight can be uncomfortable and more prone to breaking, while one that's too loose can slip off, compromising protection. This calculator helps you determine your recommended nominal width and size category based on your erect measurements.
Why Proper Fit Matters
Safety: A well-fitting condom is less likely to break or slip, offering better protection against STIs and unintended pregnancies.
Comfort: The right size ensures a comfortable experience, enhancing sensation and reducing distraction.
Confidence: Knowing you're wearing the correct size can boost confidence and reduce anxiety during intimacy.
How to Measure Correctly
For accurate results, measure when fully erect:
Penis Girth (Circumference): Use a flexible measuring tape or a piece of string (then measure the string with a ruler). Wrap it around the thickest part of your erect penis. This is the most critical measurement for condom fit.
Penis Length: Measure from the base (where it meets the pubic bone) to the tip of your erect penis. While girth is more important for nominal width, length can influence overall comfort and brand choice.
Enter your measurements in centimeters below.
Understanding Nominal Width
Condom manufacturers use "nominal width" as a key sizing indicator. This measurement, usually in millimeters (mm), represents half of the condom's circumference when laid flat. It's not the same as your penis girth, but it's directly derived from it. Our calculator provides this value to help you compare with condom packaging.
Important Considerations
This calculator provides a general guideline. Individual comfort and brand variations can influence your ideal choice. Some brands may fit differently even with the same nominal width. Experimenting with a few sizes and brands is recommended to find what works best for you.