New penis survey from TheyFit: One size does NOT fit all!

Theyfit condoms reveal the largest, most accurate penis size survey data ever gathered.

You will most certainly be happy to discover how consistent these data are with the ones already gathered in this post, in this one, and in this one as well.

An anonymous sample of over 20,000 men shows that the UK ‘normal’ [size] is not 6 inches – it is nearly a whole inch less!

And whilst length is commonly the ‘measure of a man’, girth should not be overlooked as the survey reveals a staggering 4 inches difference when it comes to the circumference of the smallest and largest.

• Average length is 5.1” (13cm), ranging from less than 3” up to more than 10”.
• 26% of male population is less than 5" in Length,
• 53% is between 5" and 6" in Length,
• 21% is longer than 6" in Length.

• Average circumference is 4.7” (12cm), with condom widths that fit girths of 3.5” up to 7.5”.

TheyFit’s size database was compiled by converting its unique "FitKit" measurements into metric sizes.

The FitKit provides each user with a randomised size code such as M17 or S77, so it’s not immediately obvious if someone needs a large or small condom.

Joe Nelson, founder of Theyfit comments, “Our anonymous data represent the most accurate survey of penis sizes ever collected. Previous studies have relied on self-reported measurements from men, leading to an issue of ‘size exaggeration’. But men buying our condoms are much less likely to do this for 2 reasons – firstly because they are parting with money for a custom fit condom and secondly because of our patented randomised size code system (rather than labels like small, medium and large), there’s simply less focus on whether someone is bigger or smaller – it’s all about getting a custom fit.”

I managed to get in touch with Joe Nelson himself, and he kindly answered to some of my further questions:

• Was the circumference distribution normal (I believe you have less activity for standard sizes than for small or big sizes)?

Joe: Yes, quite a wide distribution. On the contrary, some of our happiest customers, based on feedback, are guys who have a nominal width requirement of 53 or 55mm, but love the fact that TheyFit are the correct length for them. Because we don’t market as “the condom for big or small guys” but instead as “the great condom for every guy” then I think this explains why guys of all sizes come to us, and enjoy us. Fact is, traditional condoms don’t fit nearly all guys, owing to being at least 7” long (but usually 205mm or 8.1”). 11 clinical studies dating back to 1993 identify fitting issues that 40-45% of guys experience, and they all think the number might be too low as many men don’t realise “it doesn’t fit” is even a valid complaint.

• What is the standard deviation for circumference?

Joe: The s.d for nominal width was 6.4mm i.e 12.8mm circumference so almost exactly half an inch. We assume an average 18% latex stretch for optimum comfort, so you can expand it to circumference using that.

• How did you build your data from numbers to cm (or in)?

Joe: [I] took a mid point for each letter/number. The critical part for accuracy is that the guys measuring are more likely to be honest. The midpoint methodology will cancel itself out over a large sample set like ours, from a mathematical perspective.


From all these information, we can draw some fair conclusions:

• Average erect penis girth: 120mm +-15.1mm (4.7in +-0.59in)
• Average erect penis length (do not press the pubic bone with your ruler): 130mm (5.1in).
• About 10 to 20% condom stretch is tolerable for most guys (18% being the optimum for comfort with TheyFit comdoms), and above 25%, you are going to have a bad time. It's likely going to feel much too tight for you at the base.
• Generally speaking, with store-bought condoms, above 135mm (5.3in) circumference you are going to be having issues with tightness and below 115mm (4.5in) a normal condom will likely be too loose and slip or fall off. 

References:

TheyFit - Reddit FAQ

TheyFit - National condom day

The Inaugural TheyFit UK Size Study Survey