Our O-ring sizes
We make: 1.65", 1.75", and 2.0".
Every product page lists which ring that style has. Check there rather than assuming, because colorways within the same style don't always share a ring size.
The trap: a "close enough match"
A 1.85" toy and a 1.75" ring sounds close enough - it isn't. That's a tight fit, and tight is the thing to avoid. Go up to the next ring size.
If your toy is narrower than your ring
Add a Stabilizer Insert. It fills the gap so the toy sits securely, giving you more control and stability.
Two versions, not interchangeable. One stabilizer is designed for Brief+ and Panty+ styles. The other is designed for the Boxer and High Rise styles. Match it to the harness you own.
To use it: slide the stabilizer in behind the O-ring, then push the toy through.
If your toy is wider than your ring
Size up to a wider ring. Don't force it.
Why the rule exists
Force silicone through a gap that won't give and one of two things happens. The ring tears through the fabric around it, or, with softer silicone, the squeeze and the rubbing tear the toy.
Neither is dramatic. It's gradual, it looks like ordinary wear, and most people never trace it back to a ring that was a hair too small.
Why our O-rings don't stretch
You'll see stretchable elastic O-rings on other harnesses, advertised as fitting toys of any shape and size. One harness, every toy, no measuring. It sounds like flexibility.
What it is is a squeeze. An elastic ring holds a toy by constant compression, and constant compression on softer silicone is precisely how softer silicone gets damaged. The stretch being sold as convenience is the same stretch slowly chewing on your toy.
So ours are fixed, in a range of sizes. You have to know your toy's diameter, which is one more thing to check. In exchange, your toy is held rather than gripped, and it lasts longer.
The 2.0" is a different pattern
Our 2.0" styles aren't the same garment with a wider ring. We redrew the pattern. The waistband drops lower, closer to the o-ring, and it's a 2.5" band instead of the 1.75" band.
Wider band, sitting closer to the o-ring. A bigger toy puts more leverage on the front of the garment, and a standard band higher up doesn't counter that as well.
Two rings: pack low, play high, double dildo compatible
Duo styles have two O-rings stacked on the front panel, and the second one does more than give you options.
Run the shaft through the lower ring and your toy sits down between your legs, packed and out of the way. Move it up to the upper ring for play. One garment, both jobs, no changing in between and is our recommended go-to style for share toys.
Works with any toy that fits a 1.65" ring or smaller. You can also run two toys at once.
Look for Duo in the name if you want two O-Rings: Duo Brief+, Duo Panty+, Duo Boxer+. The + on its own means something different, double layer, the two-pairs-of-underwear-in-one construction.
Bringing your own toy
Check that it's labeled "harness-compatible": a flat, stable base built to sit against a ring.
Sharing
Using a harness and toy with a partner, or switching between partners? Clean toys per the manufacturer's instructions between uses, and consider condoms on toys when sharing or switching between different kinds of penetration.
The short version
- Measure the widest part of the shaft.
- Pick a ring slightly larger.
- Narrower than your ring? Stabilizer Insert, cut for your style.
- Wider than your ring? Size up, don't force it.
- Want to pack and play in one garment or use a double dildo? Duo, with a toy 1.65" or under. Just need a little lift for your double dildo? Check out our O-Jock.
Back to the full buying guide, or the sizing guide for your waist size.
J / RodeoH