How to Measure Your Penis Size Properly, Accurately, and Most Importantly, Consistently

UPDATED by Jeff Ferrara on December 29, 2016

So many guys fail to measure properly, and as a result, their results are heavily distorted.

They don't know their true size, or if they're truly making gains.

In this guide, we're going to make sure that you know exactly what to do to properly, accurately, and consistently measure your penis size.

Measuring with giving considerations to temperature

I'll keep this consideration short and sweet.

Just remember that temperature affects blood flow to the penis. Cold temperature restricts blood flow to the penis (vasoconstriction), while warm to hot weather improves blood flow to your penis.

You'll notice in warm-hot weather, your penis will hang lower which will make it easier to reach your Fully-Hung Flaccid State.

So if you notice your flaccid state varying a lot, give a consideration to what the temperature is like.

Understand key penis states.

This is the first important thing.

Of course, we're confident you know about the main two general states: flaccid and erect.

However, there's infinitely many states between fully flaccid and fully erect.

There's also negative size that happens with shrinkage.

This is because the amount of blood flowing in your penis at any given time is never 100% exact as the previous time your measured.

Since current penis size is directly proportional to the amount of blood flowing in it, it's hard guarantee that two measurements you made at two different times are accurate.

However we're going to cover the things you do to avoid this problem from occurring.

Since we can't be 100% sure how much blood is in your penis at any given time, we can't be 100% sure what state your penis is in.

To combat this problem, we use a couple of "benchmark" states that serve as robust references:

  1. The Zero-Blood Flaccid State - This state is your minimum size. It's at the edge of becoming smaller than normal if you experience shrinkage.

  2. The Fully-Hung Flaccid States - This state is when you're at your maximum flaccid size. There is enough blood to extend your penis out such that it hangs as low as possible, just before it starts to rise and become a semi-erection.

  3. The 100% Erect State - Pretty self-explanatory. This is when you have a rock-hard erection. You can't get any bigger. Blood flow in your penis is at maximum.

Ok, now that you know the essentials behind how your size is affected, and the key penis size states to be aware of, let's talk about actually measuring your penis accurately and consistently.

The Bone-Pressed Flaccid Length (BPFL) Measurement

This is a measurement technique that you can do pretty much any time.

You will need your ruler with you.

Here are the steps to do it.

  1. Grip the glans of your penis.

  2. Pull it as far outward as you can (without hurting yourself)

  3. Find the bone at the left or right of the base of your penis, at your pelvis

  4. Take your ruler and press the edge of it against that bone.

  5. With your penis still stretched out, line up your penis next to your ruler keeping both ruler and penis completely parallel to each other.

  6. Measure by tracing the tip of your penis to the correct mark on the ruler to get your size.

Keep in mind, you want to always use the same bone and the same spot to press the ruler against.

This pelvic bone location is ideal because it's hard and not going to move anywhere. It's perfect for consistency.

Another thing you don't want to do is to angle your penis towards the ruler. Remember: keep your stretched penis parallel with the ruler.

This will ensure that you always measure consistently.

Now that we know the Bone-Pressed Flaccid Length (BPFL) Measurement technique, let's go on to the Bone-Pressed Erect Length (BPEL) Measurement technique.

The Bone-Pressed Erect Length (BPEL) Measurement

This one is very similar to the Bone-Pressed Flaccid Length Measurement.

The only difference is that your penis is in its fully-erect, maximum erection state.

  1. Get your penis to the 100% Erect State (though visual or physical stimulation)

  2. Find the bone at the left or right of the base of your penis, at your pelvis

  3. Take your ruler and press the edge of it against that bone.

  4. Angle and steady your erect penis so that it's completely parallel to the ruler.

  5. Measure by tracing the tip of your penis to the correct mark on the ruler to get your BPEL measurement.




Generally, the BPFL and the BPEL measurements are the same.

The BPFL is probably more easier to do because it doesn't require that you have a full erection - so you can do it pretty much any time.

However, the BPEL is probably the more "realistic" measurement because it's what your penis is going to actually be like when you're having sex.

These two measurements (BPFL and BPEL) are the only ones you should be using to measure length and the only ones you should be using to track your length progress.

Remember, consistent, accurate measurements are key so that you don't distort what kind of progress your making.

These two measurements are sure-fire ways to accurately know your length.

How to Measure Penis Girth

It was reported by a Cosmopolitan survey that women prefer a girth of 5.9 inches when it comes to one-night stands.

So you better be sure you're measuring girth correctly.

First we'll give some general steps on how to measure girth, then we will provide tips on how to complete this measurement.

  1. Take your tape measure in one hand.

  2. Wrap it around the thickest part of your erect penis shaft.

  3. Make a note of where the first overlap occurs - this is your girth measurement.

In principle, taking this measurement is simple, but it is actually a little challenging if you don't even have a tape measure (like one in sewing kits to being with).

How to take a girth measurement without a tape measure.

First, all you need is a hard, straightedge ruler and a string.

  1. Take the string in one hand.

  2. Wrap it around the thickest part of your erect penis shaft.

  3. Make a note of where the first overlap occurs and pinch it with your finger.

  4. Take the pinch point and press agains the zero marking on your straight ruler.

  5. Extend the string towards the increasing numbers on the ruler and the length of this segment of the string is your penis girth measurement!

You don't have to use a string either!

You can use any string-like tool that you can find in your household.

Here are some good alternatives:

  1. Velcro strap

  2. Wire

  3. Charging cable

  4. Thin cloth

  5. A thin, cut piece of paper

  6. Any kind of tape (and you can make a marking on it with a pen to help take the measurement).

  7. Floss

In Conclusion

Measuring your penis properly is the first step in any penis enlargement training program.

It accurately sets the starting point so that you can truly determine if you're making the right progress.

It's a shame because so many men will skimp on this step and set themselves up for failure or unrealistic expectations.

In this article we discussed how to take a bone-pressed flaccid measurement, a bone-pressed erect measurement, and a girth measurement.

All are important in their own way and are the fundamental measurements for penis size.




Now, if you're looking to actually add some size to your starting measurement - you may be interested in our extender that thousands of men already use.



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