Chastity Cage Size Guide
Get a recommended cage length and base ring size based on your measurements in just 30 seconds.
TOOL | CAGE LENGTH
CALCULATOR
Recommended Cage Length
Enter your flaccid penis length, then choose your preferred fit. The calculator will recommend a suitable cage length.
Recommended Length
These values are a starting point. Comfort also depends on your base ring size, anatomy, and level of experience.
TOOL | BASE RING SIZE
CALCULATOR
Calculate My Base Ring Size
Measure around the base of the penis and testicles with a soft string, then enter the measured length to get a recommended base ring size.
Recommended Size
This calculation provides a useful reference. The base ring should keep the cage securely in place without excessive pressure, while preventing too much movement or easy removal.
Don't Want to Take Your Measurements?
Our beginner selection includes classic cage designs with easy-to-choose lengths and multiple base ring sizes to help you find the right fit.
Not sure how to measure? We'll guide you through it.
How to Measure for a Chastity Cage
For reliable sizing, take your measurements while fully flaccid, without stretching or compressing the penis. Cage length and base ring size should be measured separately.
Measure Your Penis Length
• Stand in a natural position with your penis fully flaccid.
• Place a ruler against the pubic bone at the base of the penis.
• Measure to the tip of the glans without stretching or compressing the penis.
Then use the cage length calculator above to get a recommended size.
Measure Your Base Ring Size
- Wrap a soft piece of string around the base of your penis and testicles.
- Pull it gently snug, just enough to follow your anatomy.
- The string should not leave marks on your skin or cause compression.
Then lay the string flat, measure its length, and enter the measurement into the ring size calculator above.
For reference, the formula used is: measured circumference ÷ 3.14 = ring diameter.
Quick Reference
Match your measured circumference to the closest base ring size.
| Measured Circumference | 4.3 in (11 cm) | 4.9 in (12.5 cm) | 5.5 in (14 cm) | 6.2 in (15.7 cm) | 6.8 in (17.3 cm) | 7.4 in (18.8 cm) |
|---|---|---|---|---|---|---|
| Recommended Base Ring | 35 mm (1.38 in) | 40 mm (1.57 in) | 45 mm (1.77 in) | 50 mm (1.97 in) | 55 mm (2.17 in) | 60 mm (2.36 in) |
| Measured Circumference | Recommended Base Ring |
|---|---|
| 4.3 in (11 cm) | 35 mm (1.38 in) |
| 4.9 in (12.5 cm) | 40 mm (1.57 in) |
| 5.5 in (14 cm) | 45 mm (1.77 in) |
| 6.2 in (15.7 cm) | 50 mm (1.97 in) |
| 6.8 in (17.3 cm) | 55 mm (2.17 in) |
| 7.4 in (18.8 cm) | 60 mm (2.36 in) |
This table provides a quick reference. For greater accuracy, use the calculator.
The Final Choice Is Personal
This guide is designed to help you identify sensible measurements, especially if you are new to chastity or unsure between several cage lengths and base ring sizes.
However, chastity cage sizing is still a personal choice.
Use these guidelines as a starting point, then choose according to your preferences and anatomy. They will help you better understand the options available across our chastity cage collection.
Frequently Asked Questions About Sizing
Why should you measure while flaccid rather than erect?
A chastity cage is designed to limit erections, not accommodate the penis at full size. Measuring while erect would usually result in a cage length that is too long and poorly suited to how a chastity cage is actually worn.
What if you're between two base ring sizes?
Choose the available size closest to your calculated result. For example, if your result is 43 mm, a 45 mm base ring will usually be the more logical choice. If your result is 41 mm, a 40 mm ring will generally make more sense.
The easiest approach is to use the recommendation provided by the calculator as your reference.
What if you're still unsure about your size?
If you are still unsure, we recommend browsing our Beginner Chastity Cages. These models generally use more classic shapes, come in several sizes, and often include multiple base rings, making it easier to fine-tune the fit to your anatomy.
Still Have a Question?
If you have any questions, feel free to contact us using the form below. Our team will be happy to help you and answer any questions you may have.