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Sizing Guide · Cobra & Viper
KINK3D Chastity Cage Sizing Guide: Find Your Cobra or Viper Fit
KINK3D chastity cages come in 8 sizes across two designs - Cobra and Viper - sized by flaccid length from 1.25 to 6 inches. Find your perfect fit at Clonezone with our free KINK3D sizing guide & calculator, from the worldwide best-selling chastity cage that actually feels like you're wearing nothing.
Lightweight3D-Printed NylonVapour-Smoothed2 STYLES: Cobra & Viper8 SizesSized ProperlyLocked InComfort For Every Anatomy
The Basics
What Is a KINK3D Chastity Cage?
What makes KINK3D different from other chastity cages?
A KINK3D chastity cage is a lightweight, 3D-printed nylon chastity device available in two designs - Cobra and Viper - across 8 sizes and 3 widths. KINK3D make their cages using 3D printing and nylon, and that combination does something clever. It keeps them featherlight (1–3 ounces fully assembled), properly durable, and dialled in on fit in a way moulded plastic never quite manages. If you've worn a cage before and found it either rattling about or digging in, then KINK3D is the answer to your chastity prayers. And there's two styles to choose from.
Cobra is the flagship: tapered at the entrance, narrowing at the head ring, then flaring at the glans. It holds you firmly without throttling you - This is the one to go for if you want to forget you're wearing it.
Viper is fuller and more enclosed, built for anyone who wants more coverage or has a fair bit of foreskin and needs something that won't pinch. It also has a very light nylon weight with the same obsessive fit - but just a snugger ride.
How long can you wear them?
You can wear a KINK3D cage for a few hours, a few days, or several weeks, depending on your body and your tolerance. Some people sleep in them; some people wear them to work; some people just wear them for play. The key is finding your exact size so there's no pressure where there shouldn't be.
You'll pair your cage with a KINK3D base ring (which sits around the base of your penis and your balls) - select between a curved, a standard, and an XD. Then, you'll complete the chastity kit with a KINK3D lock. You can grab the lock for FREE when you purchase a full KINK3D kit at Clonezone. The lock connects the cage to the ring and stops you from letting yourself out. The lock is surprisingly easy to put into place and incredibly easy to remove, should you need or want to.
Some people wear a full device. And, some people wear the KINK3D cage with a Mr S Leather Neoprene Chastity Harness or a Lustful Lavish option - or those with penis piercings weat it using a lock through the piercing. Scroll down for accessories.
2
Cage designs
8
Sizes · Baby to BFG
3
Width options
1–3oz
Fully assembled
The How-To
How to Wear a KINK3D Cage: Step by Step
- Pick your KINK3D base ring size first. This is the hard part if you're new. The ring goes around your whole package (penis and testicles) and sits flush with your pubic area. It needs to be snug enough that you can't slip out, but loose enough that blood can flow and things don't go numb. Most first-timers land on a size 2 or 3 in Standard width. If you've measured your inner diameter before (from other devices), you can use that as a guide. Otherwise: start with a size 2, and if it's too loose, try a size 1; if it's too tight, try a size 3. A little trial and error is normal and it's not a disaster. We are here to help you find the right size.
- Get your penis soft and stand up. You're going to thread one testicle through the ring first, then the other, then your penis last. This is the fiddliest part but it gets easier after a couple of tries.
- Slide the cage over your soft penis. The head should sit snugly in the head compartment. If your head is hanging out the end or if there's a big gap at the entrance, your size isn't correct for you and you're not getting the most out of your KINK3D Chastity Device.
- Lock it. At Clonezone, we provide KINK3D's official metal locks and also Airlock's (all plastic, great if you're metal-sensitive or if you're going through an airport). Some people use a simple padlock from a hardware store. Do this with caution. We advise beginning with KINK3D's official lock and mixing things up over time, after having experience.
Head to Head
Cobra or Viper: Which KINK3D Chastity Cage Should I Choose?
The short answer: Cobra is the airier, more open design (2019); Viper is the fully enclosed, higher-denial design (2024). Both share the same size ladder, and every KINK3D base ring and lock fits both.
Two cages, one obsession with fit. The difference is the architecture, and which one suits you comes down to how you like to be held.
Cobra
The original: 2019The KINK3D COBRA is the 2019 design that changed the game. A wide entrance narrows towards the head ring, then flares at the glans, so the cage grips your shape and holds your head in place. It's the airiest, most open build in the range, which makes cleaning simple and keeps everything ventilated for long stints. If you want your cage barely there and your penis head on show, this is the chastity cage device for you. This cage is iconic for a reason - find out why.
Click here for Cobra
Viper
The armoured one: 2024The VIPER is KINK3D's 2024 follow-up chastity device with a fully closed underside, a shielded head and slim slits for airflow and easy cleaning. Its inner width stays almost uniform along the length, so there's more room through the middle, and it's completely normal for the head to sit partly in and partly out. That extra room and the enclosed shape make it kinder to foreskin and stronger on sensory denial. If you want to feel properly locked away, go for the Viper.
Click here for Viper
STILL TORN?
Select Cobra if you love that held-in-place feeling and maximum airflow. Or, alternatively, select Viper if you're uncut, on the thicker side, or want the denial dialled all the way up. Whichever you choose, a fully assembled device weighs about 1 to 3 ounces (28 to 85 grams), so you'll forget it's there right up until you remember.
Email us if you want personalised advice on which KINK3D Chastity Cage Device is right for you. Don't be shy!
The Full KINK3D Ranges: Cobra and Viper
KINK3D Chastity Cage Sizes: Cobra vs Viper, Size by Size
Below are all of the KINK3D Chastity Cage sizes available at Clonezone, across the COBRA and VIPER ranges — the same eight-size ladder, two very different silhouettes. Cobra up top, Viper below. Tap any size to shop it.
Scroll Down For Our KINK3D Sizing CalculatorFind The Right Size For YouScroll Down For Our KINK3D Sizing CalculatorFind The Right Size For You
Get It Right
Why Accurate Measuring Matters for Chastity Cage Fit
Take SIX separate measurements of your FLACCID length over a day or two. This helps us find your typical smallest instead of a freak reading from a cold morning. Then we'll tell you which KINK3D cage is right for you. No guessing required.
Find Your Size
KINK3D Chastity Cage Size Calculator
SIX measurements over a day or two gives us your true baseline. Measure across normal conditions, not right after a hot shower or when it's freezing. Knowing your size at your most 'normal' state will give you the best reading for a perfect fit.
Your measurements
Six honest measurements and we'll point you to your KINK3D size.
This tool is a guide, not gospel. Chastity sizing takes a little trial and error, and everybody hangs differently. Unsure at any point? Ask us.
How to Measure
- Strip back. Take off any cock rings, base rings or supportive bands. Stand up if you can and let everything hang naturally, fully soft. No helping hands.
- Top side, base to tip. Measure along the top of the shaft, from where it meets your body to the tip of the head. Uncut? Measure to the end of the head, not the foreskin, and leave everything exactly where it sits.
- Soft tape or string. Use a cloth tape measure, or a piece of string you then hold against a ruler. Follow the curve rather than bridging it.
- Six readings minimum across a day or two. Measure under normal conditions. Not straight out of a hot bath and not when you're freezing. We're after your typical smallest, so more readings means a sharper answer.
ENTER YOUR SIX READINGS HERE.
Fill in at least six measurements. Decimals are fine, e.g. 3.4. Add more by clicking 'Add another reading'.
Units
One or more readings look off. Check the highlighted fields and your units, then try again.
Your recommended size
S+
KINK3D Cobra S+
Suggested for 3.5-4.25 in (9-11 cm)
Your typical smallest: 3.7 in / 9.4 cm
These sizing suggestions come straight from KINK3D's own guidelines for each cage. But bodies aren't spreadsheets - if you're stuck between two sizes, chat to us first.
Please email us with any specific enquiries if you're very unsure.
Sizing the Ring
How Do I Measure My KINK3D Base Ring Size? Put the Tape Down
Don't measure for the base ring. Tape measures lie here, and they usually lie big. If you've worn chastity before, match against rings you already know. First-timers most often land on a 2 or 3 in Standard, and a little trial and error is completely normal.
Standard start with this ring
Flat ring with 8mm thickness. Works for most people and most bodies. Rings come in eight sizes, from about 38mm to 60mm diameter.
XD
This ring extends you forward by an extra 2.5mm further forward for a tighter gap. Good for smaller balls and stopping escapes. 38-60mm.
Curved
Curved Rings: 5 mm backward curve at the bottom. Good for relieving pressure under the scrotum. Made for larger, heavier balls. 38-60mm.
CLONEZONE OFFER DISCREET & SANITARY IN-STORE KINK3D CHASTITY SIZING
STILL NOT SURE? COME IN-STORE.
If six readings and a tape measure are not doing it for you - then skip the process and come and visit a Clonezone store instead. Our trained team offer in-store sizing at Clonezone Soho, Clonezone Manchester, and Clonezone Birmingham. This is a discreet and sanitary service designed to get you into the right cage the first time, with no guesswork required.
Do I need an appointment for a KINK3D sizing?
No. No appointment is necessary. Just pop into Clonezone Soho, Clonezone Manchester, or Clonezone Birmingham, ask for a KINK3D fitting, and one of our trained team will size you up on the spot.
What does the in-store sizing service involve?
Our trained team members will use sanitised equipment, provided by KINK3D, to measure you and help assit you with the perfect size cage for you and your anatomy. It's a discreet and sanitary service designed to get you into the right cage the first time, with zero guesswork and zero awkwardness (we promise, we've heard it all). It's ideal if your six readings came back all over the place, if you're stuck between two sizes, or if you'd simply rather have someone experienced confirm it in person before you buy.
At a Glance
KINK3D Chastity Cage Size Chart: Cobra & Viper
Eight lengths run across both Cobra and Viper. Find your typical smallest flaccid length in the middle columns and your size is on the left. Two things worth knowing: if you land on the line between two sizes, take the shorter one, and yes, your cage will be shorter than you are. That's by design. It keeps everything seated exactly where it should be.
| Size | Flaccid length (in) | Flaccid length (cm) | Widths |
|---|---|---|---|
| Baby | 1.25-2 | 3-5 | Standard, Narrow, Wide |
| N | 2-2.5 | 5-6.5 | Standard, Narrow, Wide |
| N+ | 2.5-3 | 6.5-7.5 | Standard, Narrow, Wide |
| S | 3-3.5 | 7.5-9 | Standard, Narrow, Wide |
| S+ | 3.5-4.25 | 9-11 | Standard, Wide |
| R | 4.25-5 | 11-12.5 | Standard, Wide |
| R+ | 5-5.5 | 12.5-14 | Standard, Wide |
| BFG | 5.5-6 | 14-15 | Standard, Wide |
On widths: Standard fits most people. Narrow if you run slim when soft, Wide if you run thick. Wide can also help some uncut wearers avoid squeezing down on the foreskin.
Rings, Decoded
KINK3D Base Ring Size Guide: Standard, XD & Curved Explained
The ring is the trickiest part of chastity, and the tape measure is your enemy here. Measuring tends to hand people a false sense of confidence and a ring two sizes too big. If you've worn other devices with flat circular rings, size off what you already know by matching inner diameters. Brand new? Most first-timers land on a 2 or a 3 in Standard, and a little trial and error is part of the initiation.
KINK3D rings are sized by inner diameter, eight sizes from about 38 to 60 millimetres:
| Ring size | Inner diameter (in) | Inner diameter (mm) |
|---|---|---|
| 0 | 1 ½ | 38.1 |
| 1 | 1 ⅝ | 41.3 |
| 2 | 1 ¾ | 44.5 |
| 3 | 1 ⅞ | 47.6 |
| 4 | 2 | 50.8 |
| 5 | 2 ⅛ | 54 |
| 6 | 2 ¼ | 57.2 |
| 7 | 2 ⅜ | 60.3 |
Thinking Size 0? Try a 1 first unless you're certain. Eyeing a 6 or 7? Try a 5 first. The extremes are for the genuinely extreme.
All three ring styles exist to control one thing: the ball gap, the space between ring and cage that decides whether everything stays put.
Standard is 8mm thick and right for most people.
XD reaches 2.5mm further forward, which tightens the gap and stiffens the ring, making it the anti-escape option for smaller balls.
Curved bends 5mm backwards at the bottom to relieve pressure under the scrotum, lovely for bigger loads, though smaller balls can slip through a Curved gap, which rather defeats the object.
No Awkwardness
Real Questions, Real Answers
Here are some of Clonezone's most frequently asked questions about KINK3D Chastity Devices: how they fit, how they feel, how they operate, and how to wear them safely and hygienically.
Ask Away: All About KINK3D Chastity Cages at Clonezone
KINK3D Chastity Cage FAQ: Sizing, Comfort, Hygiene & Wear
What size chastity cage do I need?
Measure your flaccid length six times over a day or two using the top-of-shaft method, then match your typical smallest reading against KINK3D's 8-size ladder (Baby to BFG). Or let our free KINK3D sizing calculator above do the work and give you an instant recommendation.
How do I measure myself for a chastity cage?
Stand up, go fully soft, and measure along the top of the shaft from where it meets your body to the tip using a soft tape or string. Take six readings across a day or two rather than one - cold or post-shower readings run small and will skew your result.
Will I get hard in it?
Not fully, no. The whole idea is that it stops you from getting hard. You might plump up a bit, but a properly-fitted cage will prevent a full erection. Some people find that incredibly arousing. Some people wear it just to the office and take it off at home. Some people wear it for weeks.
Can I wear it to work?
Yes. Plenty of people do. A cage under business trousers, jeans, or chinos is basically undetectable. No one's going to notice. Half of the fun is YOU knowing that you have it underneath your clothes. It certainly brightens up a monotonous day at work.
What about hygiene?
You can clean it while you're wearing it. The same way you'd shower normally. Using soapy water and drying it off afterwards. Uncircumcised guys should make sure foreskin gets a proper wash, rinse, and dry, too. If you're worried about bacterial growth, you can take it off every few days for a proper clean and air. Or you can leave it on. It's your body and your rules.
Will it hurt?
Not if it fits right. A cage that's too small will pinch or numb you. A cage that's too big will chafe. This is exactly why we're asking you to measure. Once you've got the right size, the only discomfort is psychological (in a good way, if you're into it).
What about sleeping?
Some people sleep in KINK3D chastity cages. Some people don't. A proper-fitting cage is light enough that if you're not thinking about it during the day, you won't think about it at night. Try it and see.
Can I get it wet?
Absolutely. Swimming, shower, rain, piss, etc. The KINK3D chastity material dries quick and won't degrade. And they're easy to dry afterwards.
The Full Kit
What to Buy: Your Complete KINK3D Chastity Kit
Here are all of the KINK3D options at Clonezone: Cages, Base Rings, Accessories, and Harnesses. A complete setup needs three things: a cage (Cobra or Viper), a base ring, and a lock. And when you want to take it further, there's harnessing.
KINK3D Cobra Cage
Lightweight, tapered design. Available in 8 sizes and 3 widths. A hugely popular choice at Clonezone.
View Cobra
KINK3D Viper Cage
More enclosed, armoured shape with sweeping curves. Kinder to foreskin, deeper sensory denial.
View Viper
KINK3D Base Rings
Eight sizes in Standard, XD, or Curved. Interchangeable with all Cobra and Viper cages.
View rings
KINK3D Strap Ring
The strap-style base ring option from KINK3D. A flexible alternative to solid rings, for comfort and easier on/off.
View strap ring
Locks for KINK3D
Metal or Airlock (plastic). Airlock is great if you're sensitive to metal or traveling.
View locks
Lube
Silicone-safe lube for putting it on and taking it off. This helps movement and adjustment feel more comfortable. A little goes a long way - especially with silicone!
View lube
KINK3D Cage Cream
KINK3D's own comfort cream. Reduces friction and keeps skin happy during long-term cage wear. This KINK3D and LeatherDaddy collab cream is a best-seller, that regularly sells out, so grab yours whilst you can!
View cage cream
Cleaner
Toy cleaner for keeping your cage fresh between wears. This easy-to-use and skin-friendly spray is perfect for freshening up your cage or removing liquids and lube.
View cleaner
Mr S Leather Neoprene KINK3D Harnesses
Soft neoprene harnessing that keeps your KINK3D cage supported, secure and comfortable for the long haul.
View harnesses
Lustful Lavish Leather KINK3D Harnesses
Premium leather harnessing for your KINK3D cage. Sexy, elegant, comfortable, and keep your KINK3D cage in pride of place for longterm wear.
View harnessesKINK3D Chastity at Clonezone: Sized Right & Shipped Discreetly.
It's time to get LOCKED.
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