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Grab your tape measurers! The toilet paper roll test.

Grab your tape measurers! The toilet paper roll test.

I would like others to experiment and compare results with me on this.

Take a toilet paper roll, and measure the outside girth (I recorded 5.25” and I measured twice)

Measure the inside girth, make sure the tape is tight to get the largest number possible (I recorded 4.75” and I measured twice)

Now, measure the width of the paper roll, you may need to use MMs to measure (I recorded 1 mm and I measured twice)

And just for the hell of it, measure the diameter of both inside and outside (I recorded approximately 44mm at the largest for the outside and approximately 40mm at the largest for the inside, measuring many times)

Girth in mm according to the formula 3.14 * diamter = (138.16 mm girth for outside and 125.6 mm girth for inside)

125.6/138.16= .909

4.75/5.25=.905

Results: An increase of 1 mm around the entire circumference will increase girth by 0.5”

Hardness and the Feeling of Size

This could be why EQ is so important, because even 1 mm less of compression could increase your “felt girth” by 0.5”. Also, this could be an indicator of how truly difficult it is to obtain girth; you are trying to increase your girth by numbers smaller than millimeters for a noticeable gain.

I think there might be something wrong with your tube wall thickness measurement.

Let’s take your inside toilet paper roll circumference as a starting point: 125.6 mm. If circumference = pi * d (diameter), divide the circumference of 125.6 mm by pi (3.14159) to get a diameter of 40 (39.979) mm.

Now, let’s add two mm to that diameter (cross section of toilet paper roll; 1 mm additional thickness on each side). We’re up to 42 mm. Our new circumference is 42 * 3.14159, or 131.9 mm.

That is 6.3 mm larger, and that is what I would expect for a 2 mm increase in diameter. If circumference = the diameter times pi (3.14159), an increase of one mm in diameter should give you 3.14159 mm more circumference. Two mm, 6.28318 mm. But six mm is only a quarter inch, at 25.4 mm to the inch.

If your diameter readings were right, and there’s a four mm increase in diameter (more like two mm tube wall thickness), that would give you your half inch increase. Four mm would increase diameter by 12.6 mm, or roughly half an inch.

Or, if you want to do this in inches:

Take a circumference of 5.0 inches. That gives you a diameter of 1.59 inches.

Take a circumference of 5.5 inches (your half inch gain). That gives you a diameter of 1.75 inches.

So, it took a gain of 0.16 inches (roughly an sixth of an inch, or 4 mm) in diameter to get an additional 1/2 inch in circumference. Again, this makes sense. Pi (3.14159) * .16 inches = 0.50 inches.

It’s still a startling comparison, every time I look at girth in circumference and realize that every increment (fraction of an inch, or mm; whatever the unit is) in diameter is multiplied by more than three in circumference gained.

And then you get into area, or cross section, and yes, the penis is not a perfect cylinder, but when area of the cross section is pi * the radius squared, the power of increases in diameter is shown again. Take half of the gain in diameter (radius equals half the diameter), but then square it and multiply by over 3.


For Lampwick, becoming hung like a donkey was the result of a total commitment.


Last edited by Lampwick : 06-22-2008 at .

Originally Posted by Springer240

I briefly scrolled through your math, thanks for correcting my errors. One thing I noticed right away is that if the toilet paper roll is only 1 mm thick, doesnt that mean that difference in their diameters would be 2 mms? (double the width of the roll)

It would.

Originally Posted by Lampwick

Now, let’s add two mm to that diameter (cross section of toilet paper roll; 1 mm additional thickness on each side). We’re up to 42 mm. Our new circumference is 42 * 3.14159, or 131.9 mm.

But if the tube wall thickness is 2 mm, for a total of 4 mm, that gives you your half an inch increase. So I’m guessing that your tube wall thickness was closer to 2 mm than 1 mm.

I added to my original post to account for that scenario, since all your other measurements made sense then. It’s still a startling comparison, how small changes in diameter make large changes in circumference and area.


For Lampwick, becoming hung like a donkey was the result of a total commitment.

When using a tape to measure the inside, and outside, you have to take into account the thickness of the tape itself as well, not just the holder thickness.


2007-01-27 5.3" BPEL 4.8" EG, Less than 3" Flaccid, and sometimes less than 2"

As of 12-07-2008 7.75" BPEL 7.1" NBPEL 5.7"MSEG 6"+ BSEG. Ultimate goal 8+ inches NBPEL, 8.5" BPEL 6.3" EG (2" diameter just sounds so cool!)

Flaccid 5+ inches on a good day. 4 1/2+ pretty much anytime. My gains have slowed to a snails pace, but I will not quit!!!!!!!

I don’t know about all of that, I just know my dick won’t in a toilet paper tube :p


Starting BPEL= 6.7 " EG= 6.5"

July 2016 BPEL=7" EG=6.75"

Goal NBPEL=8" x EG=7"

Originally Posted by Lampwick
It’s still a startling comparison, how small changes in diameter make large changes in circumference and area.

Indeed. I’m surprised by the result.

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