4.5-Inch Girth: 42nd Percentile, About Average
A 4.5-inch (11.4 cm) erect girth sits at the 42nd percentile: thicker than about 42% of men. That is −0.2 cm against the 11.7 cm average circumference.
How it compares
11.4 cm around works out to about 3.6 cm (1.4 in) across.
This girth calls for a standard condom, roughly a 51 mm nominal (lay-flat) width. Fit is set by girth, not length.
What this size means
Right at the centre of the curve. Average erect girth is 11.7 cm around, about 3.7 cm across, and condoms sold as "standard" are built for this range (roughly 52–54 mm nominal 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 4.5-inch girth?
It lands at the 42nd percentile of erect girth, thicker than about 42% of men, using the Veale 2015 mean of 11.7 cm.
How many men are thicker than a 4.5-inch girth?
About 1 in 2 men are slimmer. In a room of 100 men, about 58 would be thicker.
Is a 4.5-inch girth above average?
It is −0.2 cm against the 11.7 cm average circumference, so 58% of men are thicker.