15 cm Girth: Top 0.2% (About 1 in 835)
A 15 cm (5.9 in) erect girth sits at the 99th percentile: thicker than about 99.8% of men. That is +3.3 cm against the 11.7 cm average circumference.
How it compares
15 cm around works out to about 4.8 cm (1.9 in) across.
This girth calls for a large / XL condom, roughly a 68 mm nominal (lay-flat) width. Fit is set by girth, not length.
What this size means
Thicker than about 99.8% of men: roughly 1 in 835 measure thicker. For comparison, the girth women picked for a long-term partner in a 3D-model study was about 12.2 cm, close to average (Prause et al., 2015). At this size the practical question is condom width.
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How this is measured
Girth is the circumference around the thickest part of the erect shaft, measured with a flexible tape or a strip of paper. It is unaffected by the bone-pressed convention that applies to length.
Common questions
What percentile is a 15 cm girth?
It lands at the 99th percentile of erect girth, thicker than about 99.8% of men, against the Veale 2015 mean of 11.7 cm.
How many men are thicker than 15 cm?
About 1 in 835 men are thicker. A room of 100 men would most likely hold nobody thicker.
Is a 15 cm girth big?
It is +3.3 cm against the 11.7 cm average circumference, at the 99th percentile, so 0.2% of men are thicker.