Whether you're shopping for the right condom, tracking personal health, or just plain curious, understanding how to measure your penis properly is important.
But let’s be real — most guys have no idea how to do it correctly. This guide walks you through the accurate, safe, and easy steps to measure both length and girth — no awkward doctor visits required.
Why Penis Measurement Matters
There’s a lot of misinformation out there about the average penis size, which can mess with your confidence. But getting accurate measurements is about more than just comparison — it’s useful for:
- Choosing the right condom size for comfort and safety
- Tracking growth or changes over time
- Better understanding your own body
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Tools and Tips for Measuring Flaccid vs. Erect Penis
Before you start, gather these tools:
- Flexible ruler or measuring tape
- String (for girth, if tape isn't available)
- Mirror (optional, but helpful for accuracy)
Be sure to:
- Measure in a warm room to avoid shrinkage
- Stand straight with feet flat
- Take multiple readings for average accuracy
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How to Measure Penis Length
Step-by-Step: How to Measure Your Erect Penis Length
- Get a full erection — it’s key for accuracy.
- Place the ruler on top of the penis, pressing gently against the pubic bone.
- Measure from the base to the tip of the glans (head).
- Record the measurement in inches or centimeters.
This is the correct way to measure penis length that doctors use. According to Healthline, the average erect penis length is around 5.1 to 5.5 inches.
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Penis Girth Measurement: A Simple Method
Accurate Method to Measure Penis Girth at Home
- Use a soft measuring tape or a string wrapped around the thickest part of the shaft.
- If using string, mark where it overlaps, then measure with a ruler.
- This gives your penile circumference (girth).
The average erect penis girth is about 4.5 inches. Knowing this helps with proper penis measurement for condom size fitting.
Flaccid vs. Erect: What's the Difference?
Measuring when flaccid is less reliable due to variability from temperature and arousal. That’s why experts recommend measuring when fully erect. But for reference, here’s how to measure flaccid:
- Length: Use the same method as with an erection
- Girth: Wrap tape or string around mid-shaft
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How to Use a Ruler to Measure Penis Length and Girth Accurately
A standard plastic ruler works fine, but a flexible tape offers more comfort. For accuracy:
- Always measure from the top side of the penis
- Press ruler gently into the pubic bone for consistency
- Don’t measure diagonally — keep it straight

Conclusion: Confidence Begins with Understanding
Measuring your penis accurately isn’t just about comparison — it’s a smart way to understand your body better. Remember, there’s no perfect number, just the right fit for you. For performance and confidence, explore our full line of delay sprays and lubricants.
FAQs About Penis Measurement
What is the average penis size?
The average erect penis length is about 5.1 to 5.5 inches, while average girth is 4.5 inches. Everyone is different.
How do I measure penis girth correctly?
Wrap a soft measuring tape or string around the thickest part of the shaft, mark it, then measure the length of the string.
Can I measure my penis for proper condom sizing?
Yes, measure both length and girth while erect. Use these numbers to find a condom that fits snugly but comfortably.