How to Measure for a Chastity Cage – A Perfect Fit Guide

Whether you're new to chastity play or a seasoned wearer, getting the right fit for your chastity cage is crucial for comfort and security. An ill-fitting cage can cause discomfort, chafing, or even safety concerns. At chastity-device.com, we offer a wide range of cages in different sizes and styles to suit nearly everyone.

Our cages range from 0.5 inches to 5 inches in length, with ring sizes between 36mm and 55mm. With so many options, we want to help you find a cage that looks great, fits perfectly, and can be worn comfortably for extended periods.

To achieve the ideal fit, you’ll need to take four key measurements:

  1. Cage Length
  2. Ring Size
  3. Internal Cage Diameter
  4. Cage Gap

Let’s break down each measurement step by step.

1. Measuring the Chastity Cage Length

A well-fitting cage should be snug—not too long, not too short. If the cage is longer than your flaccid penis, it allows room for partial erections, which defeats the purpose of chastity. On the other hand, a cage that’s too short may restrict blood flow.

How to Measure:

  • Ensure you’re completely flaccid (wait for any arousal to subside).
  • Use a soft measuring tape (or a ruler if needed).
  • Start at the pubic bone and measure along the top of the penis to the tip.
  • Take multiple measurements throughout the day and average them.

Choosing the Right Length:

Once you have your average flaccid length, subtract ¼ inch (6mm) to ensure a snug fit. The tip of your penis should lightly touch the end of the cage without excessive pressure.

2. Measuring the Chastity Cage Ring Size

The ring is the most critical part for comfort and security. A ring that’s too tight can restrict blood flow, while one that’s too loose will slide and chafe.

How to Measure:

  • Use a measuring tape or a piece of string (mark and measure against a ruler).
  • Ensure the room is at a neutral temperature—cold can cause retraction.
  • Gently pull your penis and testicles away from your body.
  • Wrap the tape/string around the base (pubic bone, under the scrotum, and back up).
  • Note the circumference where it meets.

Calculating Ring Diameter:

Divide the circumference by 3.14 (π) to get the diameter.

Example:

If your measurement is 159mm, divide by 3.14 = 50.5mm → Choose a 50mm (Large) ring.

Ring Shapes:

  • Circular Rings – Classic, uniform shape.
  • Arced Rings – Slightly elongated top-to-bottom, tapering inward.

Both shapes fit similarly, but personal preference may vary. Common sizes:

36mm (XS), 40mm (S), 45mm (M), 50mm (L), 55mm (XL)

3. Measuring the Internal Cage Diameter

The cage should fit snugly around the shaft to prevent erections.

How to Measure:

  • Wrap a measuring tape or string around the mid-shaft of your flaccid penis.
  • Note the circumference, then divide by 3.14 to get the diameter.

Example:

  • If circumference = 94mm, diameter = 30mm.
  • Choose a cage with an internal diameter close to this (slightly smaller is okay for a secure fit).

4. Measuring the Cage Gap

The gap between the cage and the ring is where your testicles sit. It should be tight enough to prevent slipping but not so tight that it pinches.

Ideal Gap:

  • Typically 8-12mm for most men.
  • If your testicles sit high, a smaller gap (8mm) may be better.
  • If they hang low, a larger gap (10-12mm) may be more comfortable.

Additional Considerations

Material Choices:

  • Silicone – Soft, lightweight, flexible. Great for beginners.
  • Resin – Hard, lightweight, durable. A balance between comfort and security.
  • Steel – Heavy-duty, inflexible, long-lasting. The premium choice for serious wearers.

Color Options:

  • Steel cages – Typically silver, but black/gold options exist.
  • Silicone/Resin cages – Available in black, blue, pink, clear, etc. (Pink is popular for feminization play!)

Lock Types:

  • External Padlock – Classic look, but may jingle.
  • Internal Lock – Discreet, quieter, and more secure.

Final Tips for a Perfect Fit

  • Take multiple measurements at different times of day.
  • Start with a snug but not tight fit—your body will adjust over time.
  • Consider a beginner-friendly cage (silicone or resin) if you’re new to chastity.

At chastity-device.com, we have cages to suit almost every size and preference. Follow these steps, and you’ll find a cage that’s comfortable, secure, and enjoyable for long-term wear.

Happy locking! 🔒