Silicone O-Cock Ring Set by Tantus

Finding the right fit for harness play shouldn't mean compromising on security or comfort. This six-ring silicone set solves the problem of one-size-fits-all accessories by offering precise sizing options that work with any dildo base.

What it is

This is a collection of six silicone rings engineered to connect dildos securely to harnesses during strap-on play. Each ring stretches over a dildo's base, then seats into your harness attachment point, locking the toy in place for penetrative use. Made from 100% medical-grade silicone, they're non-porous, hypoallergenic, and built to last through repeated use and thorough cleaning. The precision sizing means you're not forcing a toy into the wrong ring or dealing with loose, unstable connections.

What sets these rings apart is the breadth of compatibility they deliver. Six different diameters—1.2", 1.48", 1.74", 1.97", 2.22", and 2.5"—mean you can match almost any toy to the right ring size. Unlike single-ring systems that force compromise, this set removes guesswork and adapts to your collection. See the full BDSM Australia range of Cock Rings to explore other harness and attachment options.

Key features

• Six graduated sizes: From 1.2" to 2.5" diameter, covering toys from slim to substantial bases.
• Ultra-Premium Silicone: Medical-grade material that's body-safe, non-porous, and resistant to degradation over time.
• Harness-ready design: Engineered to seat securely in standard harness rings, preventing slipping or rotation during use.
• Flexible yet durable: Stretches easily for installation but maintains shape and tension to keep toys locked in place.
• Easy sanitization: Boilable, bleachable, and dishwasher safe for comprehensive cleaning between sessions.

Specifications

• Ring diameters: 1.2", 1.48", 1.74", 1.97", 2.22", 2.5"
• Material: 100% medical-grade silicone, non-porous and hypoallergenic
• Power source: None required—purely mechanical attachment system
• Waterproof: Fully submersible for cleaning and sanitization
• Cleaning methods: Mild soap and warm water, boiling, bleach, or dishwasher safe
• Box contents: Six O-rings in graduated sizes
• Storage: Cool, dry location away from direct sunlight

How to use a cock ring

Start by selecting the ring size that matches your dildo's base diameter. Stretch the ring gently over the toy's base, working it down until it sits snugly just above the widest point. The fit should be firm enough that the ring won't slip during use, but not so tight that it damages the silicone or toy material. Once the ring is seated on the dildo, insert the assembly into your harness and position the ring into the harness attachment point, securing it fully before beginning play.

During use, check that the ring remains locked in place and the dildo doesn't rotate or shift. If you're switching between toys mid-session, remove the ring from the first dildo, clean it briefly if needed, and fit it to the next toy. Many users keep their harness loaded with one ring and swap toys as scenes progress. For extended or intense play, having multiple rings already stretched and ready speeds up transitions. Explore the full BDSM Australia range of Spiked Cock Cages if you're interested in other harness-compatible accessories.

Care and storage

Wash each ring with mild soap and warm water immediately after use. For deeper sanitization, boil the rings for three to five minutes, use a bleach solution, or place them on the top rack of your dishwasher. Air dry completely before storing. Keep them in a cool, dry place away from direct sunlight and extreme heat. Store in a dedicated pouch or container to prevent dust accumulation and keep them organised by size.

Learn more

Understanding how O-rings enhance harness compatibility and your overall strap-on experience takes time and experimentation. Read more about cock ring selection and use in our guide to Je Joue Mio Cock Ring. You'll find practical insights into sizing, fit, and how different ring options change the dynamics of partnered play.

Mistress Athena's training notes

By Mistress Athena — professional dominant and kink educator, sole instructor behind BDSM Australia's library of training videos. Read her full bio →

These rings are far more than practical accessories in my scenes. I use them as instruments of control, selecting sizes that push my submissives beyond their comfort zone. Watching them stretch and accommodate each ring—the physical effort, the mental surrender—tells me everything about their submission that day. Smaller rings demand precision and restraint; larger ones require complete surrender.

My strategy shifts with each submissive's training level. Early sessions use moderate sizes to build confidence and establish rhythm. As they progress, I introduce larger rings mid-scene, forcing them to adapt on demand and deepening their psychological dependence on my direction. The anticipation alone—not knowing which ring I'll choose—creates a power dynamic that extends far beyond the physical sensation.

The silicone's durability means these rings withstand intense, repeated use without degrading. I've pushed submissives hard with these tools, and they've never failed me. That reliability lets me focus entirely on control and observation rather than worrying about equipment failure. Between sessions, I sanitize them thoroughly—boiling is my preferred method—and store them where my submissives can see them. Visibility reinforces my dominance.

See this and similar tools in action across my 300+ training videos on the BDSM Australia channel.

How it compares

Why you'll reach for it

Find yourself reaching for this set whenever harness play demands precision and reliability. Six graduated sizes mean you're never forcing a toy into the wrong ring or settling for a loose fit at BDSM Australia. The medical-grade silicone outlasts cheaper alternatives, and boiling sanitization takes seconds. Whether you're new to strap-on play or refining your technique, this set delivers the versatility and security every harness user needs. Order yours today. Quality Bondage Gear Without the Guesswork.