How to Measure Penis Size: Length & Girth Guide

For a consistent erect-length measurement, place a ruler along the upper side of the shaft and measure from the base to the tip. If you want to compare with research that uses bone-pressed erect length, gently press through the pubic fat pad until the ruler reaches the pubic bone and record that you used this method. For girth, wrap a flexible tape around the shaft without squeezing the skin; use the same location and method when repeating the measurement.

Step-by-step erect length measurement

1. Measure when erect. 2. Place a rigid ruler along the upper surface of the shaft. 3. For a bone-pressed measurement, press gently to the pubic bone through the fat pad. 4. Read the distance to the tip of the glans. 5. Repeat using the same method if you want to compare measurements over time.

Why you should never measure underneath

For a consistent bone-pressed measurement, use the upper surface from the pubic bone to the tip. Measurements taken from the underside or from the skin junction use a different starting point and should not be compared directly with a bone-pressed measurement.

How to measure girth at the right spot

Use a flexible tape around the mid-shaft, keeping it in contact with the skin without squeezing or indenting it. Record the measurement in centimetres or inches and use the same location and method when comparing later measurements.

My Size Report provides a private, calculator-led way to understand measurements against published research. Results are informational and should not be treated as medical advice.

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