HAPPY 4TH! Our team is observing July 4th with a short summer break. Orders placed today will ship on Wednesday.
Primal cock rings are ergonomically designed for comfort and performance.

Sizing Guide

How to measure for the perfect-fitting cock ring

Gather Your Supplies. You'll need a piece of string and a ruler to get your measurement. We recommend using a string instead of trying to use a soft tape measure.

Measure. Wrap the string around your penis and behind your balls. Mark the string where it meets. You want the string quite snug. You should be able to just fit a finger between your skin and the string when you're soft. And it should be comfortably tight when you're hard so that you can't fit in a finger. You may want to measure both soft and hard to double-check your size.

Determine Your Size. Measure the distance from the end of the string to the mark.  This is the circumference.  Use the handy table below to get your size.

Circumference Ring Diameter
13.0-14.5cm (5.0-5.75in) 40mm (~1.6in)
14.5-16.5cm (5.75-6.25in) 45mm (~1.8in)
16.5-18.0cm (6.25-7.0in) 50mm (~2.0in)
18.0-19.5cm (7.0-7.75in) 55mm (~2.2in)

Tips For Measuring

  • Most guys are in the 40mm-50mm range.
  • 55mm is a pretty big ring. So if you're not bigger than average, try measuring again and make sure you pull the string tight.
  • If you have a good-fitting round ring, MEASURE ANYWAY. You may find your Primal ring size is 5mm (~.2 in) smaller than your round ring size. Our keyhole shape fits a bit looser than a round ring with the same diameter.
  • Measure twice!  Due to the intimate nature of these rings, we can't accept returns or exchanges.

How to put on your Primal Ring

The most important thing to remember when putting on your ring is:

The Primal 'P' should face up and away from you (so other people can read it!).

  1. Position the ring so the 'P' is facing up and away from you.  The narrow end of the ring will be down.
  2. Start with your balls. Slip them through, one at at time, starting with your lowest-hanging boy.
  3. Once your balls are through, tuck your penis down and through the ring.
  4. Scoot the ring up into position.

Remember: Safety first! Do not wear a ring that is too tight, and remove the ring immediately if you feel discomfort, a sensation of coolness, observe any changes in color, bleeding, or feel tingling or numbness. If in doubt, take it off. Men with pre-existing genital conditions or injuries, or those taking anticoagulants should consult their physician prior to use. Cock rings should not be worn for more than 30 minutes, and you should not sleep in a ring.

Find Your Perfect Ring

See all our rings
Primal:Fusion Cock Ring in Matte Stainless Steel Primal:Fusion Cock Ring in Matte Stainless Steel

Designed with a narrower, curved band for amazing comfort.

Primal:Fusion in Satin Black Stainless Steel Primal:Fusion in Satin Black Stainless Steel

Comfort meets style, wrapped in a durable, body-safe black finish.

NEW! Primal:Spark Cock Ring in Stainless Steel NEW! Primal:Spark Cock Ring in Stainless Steel

The narrowest ring in our lineup. Perfect for guys who prefer a bit less bulk.

NEW! Primal:Spark Cock Ring in Glossy Black Stainless Steel NEW! Primal:Spark Cock Ring in Glossy Black Stainless Steel

A narrow ring in a striking, durable black finish that's sure to grab attention.