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1) Sizing your KTB: The metal band on your Kali's Teeth Bracelet should be approximately the same width as your erect penis. If the metal band is too narrow the device will be unbearably tight and extremely painful when you become aroused.
Test rings are the best way to determine which size band will work best for you. Strings or tape measures are too thin and too flexible to accurately determine a ring size, and are prone to error. Inexpensive test rings may be purchased from the following distributor:
https://tinyurl.com/Rubber-Test-Rings
After choosing a width for the metal band you can then decide on a level of intensity for your KTB. The level of intensity is determined by the length of the teeth. Three levels of intensity are available: Mild, Intense, or Severe.
The mild teeth will reduce the inside diameter of the metal ring by 1/2 inch; The intense teeth will reduce the inside diameter of the metal ring by 5/8 inches; and the severe teeth will reduce the inside diameter of the metal ring by 3/4 inches.
To determine how much "bite" the inner diameter of teeth will be on your KTB, use the following formula:
Band Width - Teeth Length = Inner Diameter of Teeth.
For example, if Band Width is 1-1/2", and the mild Teeth Length is 1/2", then:
1-1/2" - 1/2" = 1 inch Inner Diameter of Teeth.
The mild version is meant for 24/7 wear. The intense is meant to be a training device and for expanding limits, and the severe version is a punishment device for short term use. However, since pain tolerance can vary widely between individuals, what may be intense for you can be mild for another person. Therefore, these guidelines are meant as a general basepoint from which to begin. In the event you order incorrect teeth size you can have your KTB re-lined for a fee. Metal band width cannot be resized once a device is made.
2) Optional Base Ring: The KTB can be used with, or without a base ring. A base ring is worn behind the penis and testicles, and adds another level of security to a Kali's Teeth Bracelet. The KTB is locked to the ring.
If you don't have a good idea what size ring you need, an inexpensive and easy way to test is to obtain some rubber O-rings from your local hardware store. These rings are sold in various, appropriate sizes and can be found in the plumbing department, sold as "seals" for drain applications. Or you can order some test rings from the company mentioned in the link posted above.
The KTB is available in the shop: http://malechastitynow.com/shop/