Holy Trainer Sizing Advice

Holy Trainer Sizing Advice

Selecting the sheath size

There are two sizes of tubes (also called "sheath"): measuring from the bottom of the tube to the end, the length of the "Standard" model is 60mm (2.35inch); the Small model is 48mm (1.9inch). When selecting an appropriate size for yourself, you should base your selection on the distance of the underside of your flaccid shaft from the tip of the head to the end where it meets the scrotum. Do not stretch the shaft out in any way when taking the measurement.
The inside diameters of the Standard and Small sheaths are 35mm (1.4inch) and 34mm (1.3inch), respectively.

Selecting the ring size

If you have worn a CB-X product, the largest ring (2") or next largest (1-7/8") with one of the larger spacers, will normally be equivalent to a 50mm ring on Holy Trainer. The next largest (1-7/8") if used with one of the smaller two spacers, or the 1-3/4" ring with large spacers would be most closely equivalent to the 45mm. Otherwise, the 1-3/4" ring would actually be more equivalent to the 40mm ring. The 1-5/8" ring usually equates to the 36mm ring size on the Holy Trainer. 

Most men would use a ring with a 45-mm diameter. However, other diameters are available. The following is a 4-step procedure suggested by the manufacturer to help you determine the right diameter for you.
  1. Take a string some 30 cm (12 inches) long, and place it around you’re your scrotum and penis. Remember not to use elastic string, as this would skew the measurements.
  2. Make a double 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.
  4. Measure the length of the string, and select the ring size from the following. (Note, from our observations, the width of the ring makes the following measurements somewhat "forgiving". If you are right on the border between sizes, the smaller choice might be the likely better choice.)
  • Less than 119mm (4-11/16") - 36mm ring is recommended 
  • 119mm up to 132mm (5-7/32") - 40mm ring is recommended
  • 133 mm up to 148mm (5-13/16") - 45mm ring is recommended
  • 149 mm up to 163 mm (6-7/16") - 50mm ring is recommended
  • Larger than 164mm - likely to be too tight to wear safely and comfortably