Cock rings are simple devices that help to maintain a harder and longer-lasting erection by restricting the blood flowing back down your penis, which in turn makes your enjoyment last longer and orgasm more likely. Some people choose a cock ring that is worn on the shaft, others like the feeling of a cock ring that goes around the penis and the testicles. This guide will tell you how to measure yourself for both kinds.

Cock rings are measured by diameter. This is the measurement across the widest part of the hole in the ring. You want a cock ring with a diameter that's smaller than your personal measurements - this will ensure you have the constriction that you need. Start with something just a little smaller than your measurements, because the smaller you go the tighter the cock ring will be.

Most cock rings are adjustable or have stretch to them to ensure a good fit, but to be sure it will fit perfectly you need to find out the diameter of your cock or cock and balls. You may be wondering how that’s translatable to your very 3D penis, but it’s easy to calculate and we'll show you how.