It's important!  

Proper fit is critical. If you aren't sure what size is best for you, take the time to measure and calculate. Here's how, in three easy steps:



1. Prepare

A tailor's measuring tape is ideal. If you have none, you will do fine with a string or ribbon at least one foot long, a ruler and a marking pen. Now, make yourself erect.

2. Measure

You can measure in inches, centimeters or millimeters.

If using a tailor's tape, simply encircle it from under your balls up and around the top of the penis. Pull the tape until you have a very snug fit, but not an uncomfortable choke. Note the measurement.

If using a string, encircle it the same way. Pull the ends to get a really snug fit. Mark the string on both sides where they meet. Remove the string and measure between the marks.

A more accurate measurement is sometimes taken when flaccid, so take several readings in varied states of soft, hard and semi-erect. 

Remember, pull your string/tape really tight, but not to where it's uncomfortable. If you aren't sure if you're pulling tightly enough, use the One Finger Rules:

• When soft you should be able to JUST fit one finger under the string.

• When hard you should NOT be able to fit even one finger under the string.


3. Calculate

input your measurements into the calculator below.

C-MAX Super Head Band Polished Stainless Steel Donut Cock Rings
C-MAX Super Head BandPolished Stainless Steel Donut Cock Rings


Get ready for a supremely altering tug and immediate elongation as soon as you put it on.


A weighty ring for maximum stimulation, a stellar performance and an awesome appearance.







 More Measurements


Use the same procedure for three additional measurements:

• around the penis, just over the glans head

• around the shaft of the penis, at the base

• around the scrotal sac, above the testicles

Head and shaft rings can be worn when soft or partially or fully erect. Many guys like to have several sizes, and choose which to wear depending on their anticipated arousal state. Inside diameters 7/8 to 1-3/8 inch (20mm to 35mm) are the most popular sizes. 

The scrotal sac measurement will be useful for choosing a ball stretcher. Most sizes fall between 30 and 40mm, and 35mm is the standard size used by many manufacturers.

Now that you know your correct sizes, visit our how to choose a cock ring page for guidance on making your first and future selections.