Overview
Testicles are an important part of male reproductive and hormonal health, and their size and shape can often reflect certain health conditions. So, how can you measure testicle size correctly? In this article, we’ll walk you through step-by-step measurement methods, and at the end, we’ll provide reference sizes for different stages.
Common Methods for Measuring Testicle Size
There are two main ways to measure testicle size: the first is using a ruler or flexible tape, and the second is using a prader orchidometer.
Using a Ruler or Flexible Tape
1. Gently hold one testicle in your hand.
2. Use a ruler or flexible tape to measure its length (top to bottom) and width (side to side), and record the numbers.
3. After measuring, you can convert the measurements into milliliters (mL) and compare them with a testicle size reference chart.
Using a ruler or flexible tape is suitable for at-home self-checks or routine health monitoring, especially for those who want a basic understanding of testicle size and development. Measurements should be done in a warm environment with gentle hands—avoid squeezing or pulling the testicle. Keep in mind that using a flexible tape at home may be a bit inconvenient, and inexperience can lead to inaccurate results. Therefore, these measurements are only for reference and cannot replace a professional medical check-up.
Using a Prader Orchidometer
The prader orchidometer is a medical tool made up of a string of beads of different sizes (usually 1–25 mL) and is used to quickly estimate testicle volume. It is more intuitive and accurate than measuring with a ruler. Doctors sometimes informally call it a "Prader bead," "medical rosary," or "endocrine rosary."
Steps for measurement:
1. Gently stretch the scrotal skin covering the testicle and place the orchidometer above the testicle.
2. Compare each bead on the Prader Orchidometer to the testicle and choose the one that most closely matches its size.
3. The number marked on the bead is the estimated testicle volume (in mL).
The Prader Orchidometer is suitable for people who want a more accurate estimate of testicle volume, such as teenage boys, individuals doing self-monitoring, or during medical evaluations. When measuring, compare the testicle with beads of different volumes and choose the closest match as a reference. Keep in mind that slight differences between the left and right testicles are normal.
Testicle Size Reference Chart (1–25 mL)
The chart below shows the typical testicle volumes (in millilitres, mL) at different ages or stages of development. You can use it to compare with your own measurement and get a general idea of whether you fall within the usual range.
Keep in mind that everyone develops at their own pace, so the values in the chart are only for reference, not a strict standard.
Medarchitect’s Wooden Prader Orchidometer
To help users estimate testicle volume more accurately, Medarchitect offers a Wooden Prader Orchidometer. This tool features a series of wooden beads ranging from 1–25 mL, with different developmental stages marked in different colors to make comparison clearer and easier.
Product Features:
- Safe and durable material: Made from natural wood with a smooth, splinter-free finish.
- Full volume range: Covers 1–25 mL, suitable for all developmental stages.
- Easy to use: Works well for self-checks or as a clinical teaching aid.
- Reusable: Easy to clean, colorfast, and designed for long-term use.
Summary
Measuring testicle size is actually quite simple, and you can do it at home. Just be gentle, follow the basic steps, and compare your results with the reference ranges to see if everything looks normal. Remember, home measurements are only for reference—if you notice any sudden changes, pain, or anything unusual, it’s best to see a doctor promptly.
