Chastity Cages

When measuring flaccid length, allow the penis to hang naturally. Measure along the top side of the penis from base (where it meets the body) to tip.

We suggest measuring several times over the course of the day under "normal" conditions — not right after a hot shower, and not when it's extremely cold. The goal is to find your normal smallest flaccid length, rather than the absolute smallest you ever get.

The advice on this page is a best guess, but everyone's anatomy is different. It is not a guarantee.

New to chastity and/or Cobra cages? We highly encourage you to seek sizing advice before ordering. You can email us directly or ask the community on Reddit at r/kink3d (NSFW). In addition to advice, r/kink3d contains many photos of customers wearing each size of Cobra cage (NSFW). Looking at examples can be a great way to visualize which size may be best for you.

Length Advice

In our experience, customers are happiest when their Cobra cage is a good match for their flaccid length. If the cage is too short, it can hang off the body and only partially cover the shaft. If the cage is too long, the head of the penis may not sit in the head section of the cage.

Getting a new chastity cage can be exciting, and we're all about that! However, please make sure you aren't partially aroused when you take your measurements. You don't want to overestimate your true size. If you're on the border between two sizes, in our experience, most people prefer going with the shorter size. For chastity experts, detailed cage measurements are available on our Cobra specs page.

Width Advice

We've found that the Standard width works well for most people. If you have a thinner than average penis or have found that other chastity devices have been loose on you, a Narrow width might be a good choice. On the other hand, if you have a thick penis or have had trouble fitting into other devices, the Wide option is probably better to consider.

Base Rings

Finding the perfect ring size is one of the trickiest parts of chastity. In our experience, using a tape measure can often give a false sense of confidence and/or result in a ring that's much too large. If at all possible, our advice is to choose your size based on previous experiences with chastity devices. If you aren't sure how our rings may compare to other products you've tried, we highly recommend the r/kink3d community on Reddit, where you can find lots of advice from experienced wearers. Or you can ask us directly!

KINK3D base rings are measured by inner diameter.

Width Advice

1) Take a 30 cm (12 inches) long string and wrap it around your scrotum and penis. Do not to use an elastic string, as this would alter the measurements.

2) Tie a knot: the string should be tight enough to make it difficult for you to slip a finger under it, yet not so strong as to cut off the blood flow. Leave the string on for 5 minutes.

3) To make sure it is the right diameter. Cut the string with a pair of scissors, taking care not to hurt yourself while doing so.

Measure the length of the string, and divide by 3.14 (pi) to find the diameter that fits you best in our size chart..

Note: The smaller ring sizes have slightly more room in the top-left and top-right corners (compared to a circle) due to the position of the side slots.