Product Details
- Width: 0.7 cm (~0.25 inches)
- Weight: ~55 grams (~2.0 ounces) varies slightly by size
- Sizes: Available in 4 standard diameters (40mm, 45mm, 50mm, 55mm)
- Cloth storage pouch included
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SHOP NOWHow to measure for the perfect fit
![](https://cdn.shopify.com/s/files/1/2161/6211/files/step_1_2x_2b9a8758-d6bf-4749-8b8d-183f34dad850_300x.png?901089396224384659)
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.
![](https://cdn.shopify.com/s/files/1/2161/6211/files/step_2_2x_25e375f3-1a25-4fe2-a1e9-7f0ec8cb7529_300x.png?901089396224384659)
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.
![](https://cdn.shopify.com/s/files/1/2161/6211/files/step_3_2x_9b063a2a-fb7d-4028-9928-b3aedfa6b0a4_300x.png?901089396224384659)
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.