Wrap a string or flexible tape measure around the thickest part of your erect penis. That number (in inches or mm) is your circumference/girth. This is the measurement that matters most for condom fit — not length.
Quick conversion: Divide your girth circumference by 2 to get the flat-width equivalent. Or just use the girth column below.
Sorted by nominal width (the flat width of the condom when laid flat, which determines how tight or loose it fits). Your girth ÷ 2 ≈ the nominal width you need, with a little stretch room built in.
| Brand & Name | Category | Width (mm) | Length (mm) | Best for Girth |
|---|---|---|---|---|
| MyOne 49 | Snug | 49 | Various | 3.5-4.0" |
| Glyde Slim | Snug | 49 | 170 | 3.5-4.0" |
| Iron Grip | Snug | 49 | 178 | 3.5-4.0" |
| Trojan ENZ | Standard | 52 | 197 | 4.0-4.5" |
| Durex Classic | Standard | 52 | 195 | 4.0-4.5" |
| Skyn Original | Standard | 53 | 178 | 4.0-4.7" |
| ONE Regular | Standard | 52 | 180 | 4.0-4.5" |
| Trojan Ultra Thin | Standard | 52 | 197 | 4.0-4.5" |
| Trojan Magnum | Large | 54 | 205 | 4.5-5.1" |
| Durex XXL | Large | 56 | 220 | 4.8-5.3" |
| Skyn Large | Large | 56 | 190 | 4.8-5.3" |
| ONE Legend | Large | 55 | 200 | 4.7-5.2" |
| Trojan Magnum XL | XL | 56 | 213 | 5.0-5.5" |
| MyOne 60 | XL | 60 | Various | 5.3-5.8" |
| MyOne 64 | XL+ | 64 | Various | 5.6-6.2" |
| MyOne 69 | XXL | 69 | Various | 6.0+" |
Note: Trojan Magnum is only 2mm wider than a standard Trojan. It's marketed as "large" but it's barely bigger. Most men who think they need Magnums actually fit standard condoms perfectly. Read the full breakdown here.
The most important column is width (nominal width in mm). This is the flat width of the condom — the measurement that determines how tight or loose it feels. Here's how to match it to your girth:
The Most Important Takeaway: Average girth is 4.59 inches. A standard 52mm condom fits most men. If standard condoms feel fine — not too tight, not slipping — you're in the right size. You don't need Magnums to have a good time.
A condom that's too tight restricts blood flow, reduces sensation, and is more likely to break. A condom that's too loose can slip off during sex. Both scenarios compromise protection. The right fit should feel snug but not constricting — like a properly fitted glove.
If nothing in the standard retail sizes works for you — particularly if you're on the extremes (under 4" or over 5.5" girth) — MyOne (formerly TheyFit) offers custom-sized condoms in 60+ sizes. You measure, enter your dimensions on their site, and they ship condoms manufactured to your exact specifications.
This isn't a luxury product — it's how condoms should have always worked. One-size-fits-most is a compromise that leaves roughly 30% of men in a suboptimal fit.
If cost is a barrier, many organizations provide free condoms by mail. Check our complete guide to getting free condoms shipped to your door.
For free or reduced-cost PrEP (HIV prevention medication), visit freeprep.org. And for confidential STI testing, check stdtestingquick.com.
Can't find a tape measure? Our calculator tells you your girth percentile and suggests the right condom category.
Check Your FitMeasurements sourced from manufacturer specifications and verified packaging data. Nominal widths may vary slightly between production batches. Width is the flat-width (lay-flat) measurement per ISO 4074 standard.
Girth recommendations are guidelines — personal comfort preferences vary. When in doubt, try a sample pack of adjacent sizes.