Why Proper Sizing Matters
A properly fitted chastity device should:
- Allow comfortable wear throughout daily activities
- Decrease the frequency of full erections while wearing
- Stay securely in place without excessive movement
- Not cause pain, circulation issues, or skin irritation
- Allow for proper hygiene and urination
Measuring Your perfect fit in 3 simple steps
To accurately measure your anatomy for a chastity cage, you will need: A fabric measuring tape and a few minutes of privacy.
Measure your length
- Ensure your penis is completely flaccid (not erect or semi-erect)
- Using the ruler, measure from the base of the shaft (pressed against the pubic bone) to the tip of the penis head
- Record this measurement in inches for easy comparison with our sizing chart
- For Accuracy: Do not take this measurement directly after showering, and/or with an erect (or semi-erect) penis
Pro Tip: Take this measurement 2-3 times on different days to account for natural variations in size.
Important: Never measure immediately after showering or when semi-aroused, as this will result in an inaccurate measurement.
Measure Your Girth
- With a flaccid penis, wrap the fabric measuring tape around the middle of your shaft
- Ensure the tape is snug but not tight (touching the skin all around without any slack)
- Record this circumference measurement
- Divide this number by 3.14 (π) to calculate your diameter
- Compare this to the Inner Diameter (I.D.) measurements in our sizing chart
Example: If your circumference measures 4.3 inches, your diameter would be approximately 1.37 inches (4.3 ÷ 3.14 = 1.37).
Measure the Base Circumference
- Place the measuring tape around the base of your penis AND scrotum together
- Position the tape as close to your body as possible, and taunt under the scrotum, where the base ring will sit
- The tape should be snug but not restricting
- Record this measurement
Calculate Your Ring Diameter
- Divide your base circumference measurement by 3.14 (π)
- This gives you the ideal diameter for your base ring
- Compare this result to our U-ring size chart below
Example: If your base circumference measures 6.0 inches, your ideal U-ring diameter would be approximately 1.91 inches (6.0 ÷ 3.14 = 1.91).
Note: If your calculated diameter size exceeds 2", consider purchasing our Large or XL u-ring separately.
Selecting a CB-X Chastity Cage
Choose the CB-X model with a cock cage that is closest to or slightly larger than your measured flaccid length. For comfort during long-term wear, avoid selecting a cage that is significantly shorter than your anatomy unless you're specifically seeking an extremely restrictive experience.
Choosing Your Chastity Cage
Chastity Cage Comparison Chart
I.D = Inner Diameter
| Mini-Me (XXS) |
Cage length: 1 ¼ inch (31.75mm) |
I.D.- 1 ⅜ inch (34.92mm) |
| Mr. Stubb (XS) | Cage length: 1 ¾ inch (44.45mm) |
I.D.- 1 ⅜ inch (34.92mm) |
| CB-6000S (S) | Cage length: 2 ½ inch (63.5mm) | I.D.- 1 ⅜ inch (34.92mm) |
| CB-3000 (M) | Cage length: 3 inch (76.2mm) | I.D.- 1 7⁄16 inch (36.51mm) |
| CB-6000 (L) | Cage length: 3 ¼ inch (82.55mm) | I.D.- 1 ⅜ inch (34.92mm) |
| The Curve (XL) | Cage length: 3 ¾ inch (95.25mm) | I.D.- 1 ½ inch (38.1mm) |
Fine-tuning Your Fit
Each CB-X kit features components with precise design for an effortlessly inclusive and customizable chastity experience.
Mini-Me® (XXS)
1¼" - Extreme Restriction
Our smallest model for advanced users seeking maximum restraint. Ideal balance of intensity for extreme play and comfort for daily wear.
Mr. Stubb® (XS)
1¾" - Advanced Restraint
Significant restraint with a focus on security and comfort. Perfect balance between intense restriction and wearability for everyday use.
CB-6000S® (S)
2½" - Popular Compact Choice
Our best-selling compact model offers the perfect balance of confinement and daily comfort. Ideal for beginners or users with compatible anatomy.
CB-3000® (M)
3" - The Original Classic
Our pioneered design set the standard for chastity cages with its innovative features, prioritizing ventilation and comfort for long-term wear.
CB-6000® (L)
3¼" - Worldwide Bestseller
Our most popular model, ideal for both beginners and experienced users. Balancing secure confinement and comfort for everyday wear.
The Curve® (XL)
3¾" - For Larger Anatomies
Designed with a wider inner diameter of 1½ inches and a natural curve to accommodate well-endowed wearers comfort without compromising security.
12-Hr Test
For new users, we recommend wearing your device for up to 12 hours to assess the comfort of your chastity cage before committing to extended periods of wearing. The 12-hour test will help you determine if you've found your perfect fit.
Common Sizing Questions
If you fall between two cage lengths, consider:
- Your experience level (beginners may prefer the larger option)
- Your desired level of restriction
- Your comfort priorities for long-term wear
Weight changes primarily affect the fit of the U-ring rather than the cage itself. You may need to adjust your U-ring size while maintaining the same cage length.
If you experience significant size differences between flaccid and erect states:
- "Growers" may want to choose a slightly larger cage than their flaccid measurements
- "Showers" typically find that their flaccid measurements align well with our sizing chart
Still have questions about sizing?
Our expert team is here to help. Contact us at customerservice@cb-x.com or use our Live Chat feature for immediate assistance.
Note: This Size Guide is provided for informational purposes. Individual results may vary based on anatomy and personal preferences.
