What Condom Size Do I Need? A 2-Minute Self-Check

Most people just grab a regular sized box and hope for the best. That's fine if the fit works out but a lot of the time it doesn't and a poorly fitting condom causes real issues. Discomfort, reduced sensation, slipping or breakage being a few of them.

Here's how to check your size at home in a couple of minutes.

What you need:

A soft tape measure or a piece of string and a ruler

A private moment

Step 1 - Measure girth

Wait until you're fully erect. Wrap the tape measure around the thickest part of the shaft, usually mid-shaft. Note the measurement in centimetres. That's your circumference.

Step 2 - Convert to nominal width

Divide your circumference by 2. That gives you your approximate nominal width in cm. Multiply by 10 to get millimetres.

Step 3 - Match to a size

Step 4 - Check how it actually feels

Numbers are a starting point. Real-world feel is the final test. A well-fitting condom goes on your penis without forcing it. It feels snug but not constricting and stays in place during sex while also leaving a little space at the tip.

If it feels wrong, see: Signs Your Condom Doesn't Fit Properly

A note on brand variation:

Two boxes labelled 'regular' won't necessarily be the same dimensions. Always check the nominal width printed on the back of the box, not just the label.

Full brand comparison: Do Condom Sizes Differ Between Brands?

Back to the full guide: The Complete Condom Size Guide for Australia