Quick answer
To find your MyONE Custom Fit condom size, measure the widest part of your erect penis girth and the full length from base to tip, then match those numbers to the FitCode chart.
Why measuring matters for comfort and safety
A condom that is too tight can break or reduce sensation, while one that is too loose may slip off. MyONE Custom Fit condoms use a two-part FitCode (girth number + length letter) so you can dial in the exact size you need. Taking a few minutes to measure correctly ensures a secure, comfortable fit every time.
What you need before you start
You only need a flexible measuring tape (a piece of string and a ruler also work), an erection, and about 5 minutes of privacy. Do not use a rigid ruler for girth — it will give an inaccurate reading.
How to measure your condom size in 4 steps
- Measure your girth: Wrap a flexible measuring tape around the widest part of your erect penis. Note the circumference in inches or millimeters. Common mistake: measuring too loosely or too tightly — the tape should be snug but not digging in.
- Convert girth to nominal width: Divide your girth measurement by 2 to get the approximate nominal width (the condom's flat width). For example, a 110mm girth ÷ 2 = 55mm nominal width. This is your Girth Number. Checkpoint: If your girth falls between two numbers, choose the larger one for comfort.
- Measure your length: Place the tape at the base of your penis (where it meets your body) and measure to the tip. This is your Length Letter. Common mistake: pressing the tape into the pubic bone — measure from the skin surface only.
- Match your FitCode: Find your Girth Number and Length Letter on the MyONE FitCode chart. For instance, Girth 55 + Length D = 55D. Order that size. Common mistake: assuming one-size-fits-all condoms will work — they rarely match your unique combination. Checkpoint: Write down your FitCode so you can reorder the same size every time.
MyONE sizes you might consider
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MyONE® Size 55D My Custom Fit® Condom: MyONE Size 55D combines 55mm nominal width with 5.2 inches length. This is a good starting point if your girth is slightly above average but your length is shorter than standard.
MyONE® Size 55D My Custom Fit® Condom
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MyONE® Size 57G My Custom Fit® Condom: MyONE Size 57G offers 57mm nominal width and 6.5 inches length. Choose this if you need extra width but also full length — it covers most average-to-long sizes without being too tight.
MyONE® Size 57G My Custom Fit® Condom
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MyONE® Size 64E My Custom Fit® Condom: MyONE Size 64E features the widest 64mm nominal width with a shorter 5.6 inches length. Ideal if you have a very wide girth but do not need extra length, so the condom stays put without bunching.
