It’s the same reason condoms sizes are all on the spectrum of large to extra large without actually providing a length and diameter.
In Germany the packaging indicates the [Edit: diameter half circumference] in millimeters ±2mm tolerance. Because, you know, size matters here.
Half circumference? Why?
(Yeah I zoomed in. It’s 52mm, which is fractionally over 2 inches)
The literal translation of what’s on the box makes it easier to understand:
Width of the condom when laid flat: 52 mm
It’s simply the easiest width measure you can do yourself.
That isn’t equal to the “width” of your dick though. Diameter is closer.
I guess it doesn’t really matter if the measure is standard (though elasticity would also affect fit) so you “learn your size” once, but it doesn’t seem super useful to me.
So that thing is 4 inches across? Eek!
Edit: oh, you said “half circumference”. For some reason I thought that I read diameter.
It did read “diameter”. I remembered it wrong and corrected my mistake. Sorry for not highlighting the edit. I did so now.
