Before we start, I suggest reading these threads so that the information is fresh in your mind, and also so that when I describe certain things, or go into explanation about some concept regarding the chastity belt, you are familiar with that.
viewtopic.php?f=4&t=112 (Chastity belt terms & lingo)
viewtopic.php?f=20&t=129 (Customizing Chinese solid rear strap)
Making a pattern for a chastity belt is not really all that hard. Making a chastity belt pattern that is COMFORTABLE and fulfills the concepts YOU think a chastity belt ought to fulfill, is a bit more tricky.
Before making a chastity belt pattern, you need to ask yourself these questions:
1. How long do I intend on wearing this thing non-stop? (be honest with yourself, set aside chastity fantasies and work with reality here)
2. How secure do I need this chastity belt to be? (meaning: how hard am I going to try and defeat this belt once I am in it for a bit and get my first horny episode)
3. How hidden do I want my chastity to be? (meaning: do I want to wear slinky clothing and still keep the belt hidden, or do I care if others see me in a chastity belt?)
4. How much am I prepared to spend on this chastity belt? (thinner metal is cheaper, exotic materials cost more, using machine shop services costs $$$ too!)
5. How durable do I need this chastity belt to be? (meaning: what environments am I going to be wearing this in? hot tubs with bath salts and very humid & hot to cold & dry quickly will affect chastity belt materials, especially liners and glue)
6. How much discomfort and breaking in of my body am I prepared to endure? (chastity belts are no different than corsets in this regard: they both will alter your body after time of wearing them, doubly so the tighter they are)
7. How much extra hygiene issues will I have with this belt?
Now as for me and how I answered these questions (which will help offer perspective to YOU on my instructions) is:
1. I intend for the belt I create to withstand at least 5 years of wearing (usable life expectancy) with non-stop wearing durations of between 2-5 days, and "out" times of a few hours for cleaning. I intend to not have to perform maintenance on the belt for at least one year.
2. I need my belt to defeat all attempts by me of picking the lock with conventional locksmith tools (no specialty tooling), my belt needs to withstand attack by common hand tools commonly obtained from local hardware stores, and my belt needs to withstand ad hoc attacks from cordless power tools. My belt needs to be constructed in such a way that I KNOW if I attempt to defeat the belt using certain tooling that I run the risk of bodily injury in the process, thus eliminating my desire to attempt it.
I also do not need my belt to prevent me from touching my vulva with a finger. I do need my belt to prevent any pleasurable form of inserting anything into my vagina such as a man's penis, a vibrator or a dildo or a electro egg or some such toys. I need the belt to be tight enough that while I can touch my clit, the ability to manipulate and rub it is limited and of no real value. I need the belt to not be so secure I cannot touch myself at all because I still need to perform hygiene while in belt...
3. I need my belt to be discreet, but I do not wear super slinky clothing, and if I did, I expect the waistband or a front shield auxiliary lock to telegraph through my attire.
4. I cannot afford to spend more than $200 on this project, and less is even better!
5. I need my belt to be super durable because I am very active and do not want to be limited by the belt.
6. I am prepared to suffer tightness and some chafing, however, I absolutely REFUSE to accept ANY pinching or blistering. HARD LIMIT. Past that, I'll endure a tight ass belt that cuts down on how much I can eat.
7. I need access in some way behind the front shield to get a douche nozzle inside me, I need to be able to get behind there with a washrag or a shower scrunchie and body wash. I refuse to feel funky or stink for the sake of chastity or security. HARD LIMIT. I would rather forgo some security for sake of hygiene.
Now, the answers to those questions are very critical because it will determine how I proceed with making my pattern. Just remember, there is a trade-off between "security" and hygiene. The tighter and more "impossible to touch" yourself you are, same goes for the ability to touch yourself to clean yourself. To date, there is no effective method of preventing 100% touching of your vulva and still having ability to clean yourself adequately while belted for any length of time. The more secure the belt is in preventing ANY touching of your vulva, the more frequently you will have to remove the belt in order to clean yourself. That is just the way it is.
So, the first step in making your chastity belt pattern is writing down YOUR answers to these questions. Yes, write them down. Think reasonably. Abandon ALL chastity fantasies. Seriously. If you have this notion of permanent 100% chastity orgasm denial never-be-able-to-touch-yourself-ever-again, then go away. You are not ready to seriously approach wearing a full steel chastity belt and having a happy and productive life while wearing it. You will hurt yourself, get septicemia, or get some psychological problem.
Next step is MEASURING YOURSELF ( I could have sworn I've done this one before...ah well, let's go through it again!)