Every condom packet sold in the US and the EU prints a number in millimetres. It is almost never the length. It is the nominal width — the width of the condom when it is pressed flat.
That is easy to check. One of the listings below prints 69mm and, in the same title, Width 2.7 Inches. 69 millimetres is 2.72 inches, so the millimetre figure is a linear width — the distance across a flattened condom — not a circumference.
What is actually sold
Nominal width is not a marketing abstraction. At the time of writing, packs are on sale in the US from 47 mm to 72 mm. These are real listings, not a size guide:
| Nominal width | Example listing |
|---|---|
| 47 mm | My Size Wide Condoms 47mm, pack of 10 |
| 49 mm | My Size Wide Condoms 49mm, pack of 3 |
| 64 mm | MY.SIZE 64 mm, bulk pack of 15 |
| 69 mm | My Size Pro 69mm, width 2.7 in, length 8.8 in |
| 72 mm | MY.SIZE PRO 72mm, pack of 10 |
If a packet does not state a nominal width, the manufacturer’s own product listing usually does.
How to measure yourself
You need one number: the circumference of the erect penis at the base or mid-shaft. Wrap a tailor’s tape around it, note the measurement in millimetres, and take it at the widest point you will be wearing the condom.
That measurement is not a size. It is the input you compare against the nominal width printed on the box — and the box is the only place that tells you what you are actually buying.
Why the number matters more than the label
Two condoms sold as “large” can differ by several millimetres of nominal width. The number in millimetres is the only figure that is comparable between brands — which is also why the custom-fit ranges (My Size, MyONE) sell by width rather than by adjective.
More on fit and sizing
- The reality of condom sizes
- How condoms fit
- Choosing a size
- Size differences between countries
- Asian condom sizes
- Condom sizes in Japan
Prices and availability change; the widths above were checked on 2026-11-04.
Once you have the width, the next step is putting it on correctly.