I get several emails every week about fitting problems with chastity devices. The most frequent question is about comfortably wearing the base ring. That’s the ring that you put your balls and penis through. It anchors the chastity device. These complaints fall into two categories: the ring hurts all the time, and when the penis tries to get hard the base ring slips up the penis and “strangles” the balls. There are endless forum and blog posts about these issues. Even though they cause a lot of discomfort, base ring fitting is not the most critical measurement.
Much more important is how the cage itself fits. I think that almost every guy wearing a chastity device has a poorly-sized penis cage (or tube). I’ve noticed that Mature Metal, makers of the Jail Bird chastity device has noticed this too and has revised their fitting instructions. Most guys end up with cages that are too long for them. The reason isn’t that they don’t measure correctly. It’s that while people say how a cage should fit (it should fit like a glove, always touching the sides and top of the cage), they don’t explain how to measure to get this result. Here is how I finally managed to get it right.
First of all, the flaccid (soft) penis is extremely flexible. You can see this for yourself. Take your soft penis and push it toward your body. If you’re soft, it will compress to half or less of its normal flaccid length. The same is true of the diameter. You can squeeze it without any pain to half its normal diameter. If you’ve checked yourself out at different times, you will see that the flaccid length varies at different times. It can shrink to a nub or hang down longer than usual. The diameter doesn’t generally change much unless you get hard.
The thing is that you can’t comfortably compress it much in both length and diameter at the same time. Also, reducing the diameter can restrict flow through your urethra. But compressing the length has no effect on that. Any custom cage you order wants to know the diameter of the cage and its length. If you lay your soft (make sure there is no arousal at all – soak it in ice water if needed) penis across a ruler, you will get an idea of your soft diameter. Don’t let the ruler support the weight, that will cause the diameter to expand. Do this at different times until you have several readings. Take the smallest one and subtract 1/4-inch (6 mm). That is the diameter of the cage to order.
Each chastity device maker has specific requirements in how you measure the length. If you can’t find that requirement on their website, email them for information. Mature metal wants measurements on the underside of the penis from where the scrotum ends and the penis begins all the way to the tip of the head. Be very careful to get this accurately. Don’t press the ruler into the scrotum and be sure you are fully soft. Take several measurements at different times.
Everyone gives you that advice. Many, including Mature Metal tell you to subtract 1/4-inch (12 mm) and use that as the length to order. I found that to be completely wrong. The cage that was based on this measurement almost never touched the head of my penis. Remember, we want full contact all the time. We measured the gap when the head was furthest from the end of the cage. It was about 1/2″ (12 mm) too long. I had it shortened by 1/2″ and it fits perfectly. My suggestion is to subtract 3/4-inch (18 mm) from the measured length of your penis and order that as your cage length.
In my case, I measured 2-inches (50mm) as my flaccid length. My original cage was 1 3/4-inches (44 mm) long. I had it shortened to 1 1/4-inches (31 mm). It looked too short to ever fit me. The first few days were a little uncomfortable. It felt like my penis was jammed into the cage. I even had “grill marks” on the head from when I tried to get hard inside it. After about three days I forgot the cage was there. I could pee comfortably and the urethra usually was nicely centered so no spray when peeing. When I attempted to get hard, nothing moved. The fits-like-a-glove cage kept everything in check.
The secret is to accurately measure both diameter and length. I ordered diameter 1/4-inch less than what I measured and length 3/4-inch less. My very comfortable cage is 1 1/4-inches diameter (I measured 1 1/2″) and the length is 1 1/4-inches long (I measured 2-inches). Your results may vary. Penises are highly individual.