Condom Size Calculator
Girth matters far more than length. Enter yours to see the condom width that should feel snug but comfortable. For the full background, read our condom size chart guide.
Your estimated condom width
53 mm (51–55 mm)
Size range: Standard
Most regular condoms are in this range. Start with a standard size before trying anything else.
How to measure your girth
- Measure when fully erect. Condom sizes are based on erect measurements.
- Wrap a soft tape measure around the thickest part of the shaft. No tape? Use a strip of paper or a piece of string, mark where it meets, then measure it against a ruler.
- Keep it snug but not tight, and read the number where the tape meets.
- Measure two or three times on different days and use the average.
Size chart
The same rule as the calculator, laid out as a chart. Widths are the “nominal width” printed on many condom boxes and brand websites.
| Size range | Condom width | Girth (in) | Girth (cm) |
|---|---|---|---|
| Extra snug | under 49 mm | under 4.24″ | under 10.8 cm |
| Snug | 49–51 mm | 4.24–4.50″ | 10.8–11.4 cm |
| Standard | 52–55 mm | 4.50–4.85″ | 11.4–12.3 cm |
| Large | 56–59 mm | 4.85–5.19″ | 12.3–13.2 cm |
| Extra large | 60 mm and up | 5.19″ and up | 13.2 cm and up |
If the fit still isn’t right
- Too tight or uncomfortable: try the next width up, or a different brand at the same width. Brands cut and stretch differently.
- Slips or bunches: go a width down. A loose condom is more likely to come off.
- Doesn’t roll down to the base: look for a longer condom, which is a separate measurement from width.
How this calculator works
A condom’s nominal width is how wide it measures lying flat, so twice the width is roughly its circumference. Condom makers recommend a condom that’s slightly tighter than your own girth so it stays in place. ONE Condoms, for example, says its standard 53 mm width fits most people.
We calibrated the calculator so that the average erect girth of about 4.6 inches, according to Cleveland Clinic, lands on that 53 mm standard. That works out to a condom width of about 0.455 × your girth, with ±2 mm either side because fit is personal.
Treat the result as a starting point, not a prescription. Each brand publishes its own size chart, and that chart beats any general rule. What you type here is calculated in your browser and is never sent or stored.