Condom Size Guide

Find the right condom width for a better, safer fit. Free, private and instant.

How to use the Condom Size Guide

  1. Pick metric (cm, kg) or imperial (ft, in, lb) units.
  2. Enter erect girth (around the thickest part).
  3. Enter erect length (optional) - optional.
  4. Press Calculate to get an instant result with a colour scale, chart and plain-English explanation.

About the Condom Size Guide

A condom that fits well is more comfortable and less likely to slip or break. Measure your erect girth and this guide suggests a size and the nominal width to look for on the box.

Also known as: condom size calculator, condom size chart, condom girth calculator, nominal width calculator.

Formula and cut-offs

Snug fit: girth up to 10.8 cm (47-49 mm width). Standard: 10.8-12.7 cm (52-54 mm). Large: 12.7-14 cm (56-60 mm). Extra large: over 14 cm (60 mm or more).

Frequently asked questions

How do I measure for a condom?

Wrap a soft tape or string around the thickest part when erect and note the circumference. Width matters more than length.

What is nominal width?

The flat width of the condom measured across the open end, printed on the box in millimetres.

Do condoms protect against STIs?

Yes, latex and polyurethane condoms greatly lower the risk of STIs and HIV when used correctly.

Sources and references

Written and checked by the MediHub editorial team against the sources above. Read how we build and review our calculators.

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Last updated . This calculator is for education only and is not medical advice. See the medical disclaimer.