What’s the difference between diameter and circumference?

Diameter and circumference are two ways to measure a circular object.

Diameter is the distance through a circle, a straight line from any one point on the outside, through the center to the opposite side.


Circumference is the distance around a circle, starting at any fixed point, going around the outside and returning to the same point.


Imagine taking a trip around the world, starting and ending at the same place. The distance traveled would be the circumference of the earth. Now imagine tunneling through the center of the earth coming out again on the opposite side. This distance would be the diameter of the earth.

Below are the conversions from diameter to circumference for our dilators:

Diameter       Circumference

1/2 inch          1.6 inch

3/4 inch          2.4 inches

7/8 inch          2.7 inches

1 inch             3.1 inches

1-1/8 inch      3.5 inches

1-1/4 inch      3.9 inches

1-3/8 inch      4.3 inches

1-7/16 inch    4.5 inches

1-1/2 inch      4.7 inches

1-5/8 inch      5.1 inches

How do I use my dilators?

Dilator usage can vary depending upon the condition that they are being used for. We strongly recommend that you consult with a therapist or medical professional before beginning any type of treatment.

What lubricant should I use with my dilators?

Any water-based or natural oil lubricant designed for sexual activity can be used with Soul Source dilators. DO NOT use any silicone-based lubricant, especially with the silicone dilators.

How can I clean my dilators?

Wash the dilators with warm water and mild soap or toy and device cleaner. Pat dry and allow to fully air dry before storing them. We recommend that you store your silicone dilators wrapped in a clean cotton cloth. Never soak your dilators in alcohol or sterilizing solutions containing alcohol, especially with the rigid plastic. Soul Source dilators may be wiped with an alcohol-based solution, but be sure to rinse off any residue before storing them.

Can dilators be sterilized by autoclave or boiling?

Silicone dilators may be sterilized by boiling for 5 minutes or by autoclave. If you have a problem with yeast infections, you may add two tablespoons of vinegar to two quarts of water for boiling.

What are Soul Source dilators made of?

Soul Source silicone dilators are hand-cast using 100% silicone rubber. Silicone rubber is flexible and resilient with a texture that resembles body tissue.  For quality assurance, all of their dilators are inspected, washed, and sealed before shipping.

Where are Soul Source dilators manufactured?

All of our dilators are manufactured in the United States with materials produced in the United States.

What is the difference between a dilator and a sex toy?

Sex toys are designed to provide sexual stimulation. Some vibrate; some are anatomically correct to resemble a penis. Dilators are therapeutic devices and can be used without the need for sexual stimulation. Sexual pleasure is not its purpose, the key is to use it as prescribed.