How to Measure for the Perfect Chastity Cage Fit
- Moodtime Adult Store
- Aug 4
- 3 min read
Don’t Just Lock It Up - Lock It Right with the perfect chastity cage fit
Wearing a chastity cage isn’t just about the denial it’s about the discipline, the perfect chastity cage fit, and that delicious feeling of being perfectly restrained. Whether you’re a bratty sub begging to be locked or a dom looking to control every inch, finding the right chastity cage size is absolutely essential.
A cage that’s too tight? Hello, pain and circulation issues. Too loose? Escape artist vibes, and that defeats the whole point, doesn’t it?
So let’s talk measuring with millimetre-level precision because your bits deserve a tailored prison.
📏 Measuring for the Base Ring
The Foundation of the Lock-Up - The base ring is the circular band that sits behind your testicles and at the base of your shaft. This is the part that keeps the entire device in place and if you mess this up, you're going to feel it (in a bad way).
🛠️ What You’ll Need:
A soft measuring tape (tailor-style), or
A piece of string and a ruler
A little patience and no distractions (boners not invited)
🧠 Step-by-Step:
Wrap the tape or string around the base of your penis and behind your balls the same place your cage’s ring will sit.
Make it snug, not tight. You should feel secure without being squeezed.
Note the circumference, then divide that number by 3.14 (π) to get the diameter.
💡 Ring Sizing Examples:
Circumference (mm) | ÷ 3.14 | Diameter (mm) |
173 mm | ÷ 3.14 | 55 mm |
157 mm | ÷ 3.14 | 50 mm |
141 mm | ÷ 3.14 | 45 mm |
125 mm | ÷ 3.14 | 40 mm |
🔓 Tip: If you're between sizes, go slightly bigger to avoid pinching, bruising, or blue-balled regret.
🍆 Measuring for the Cage Tube
Because Your Dick Deserves a Custom Cell. Now onto the cage itself this is the part that hugs your shaft and keeps it confined, flaccid, and frustrated. A proper cage length reduces unnecessary movement, prevents chafing, and delivers that tight, tease-ready feeling.
🛁 Start With Relaxation:
Take a hot shower or bath.
Stand upright, back straight, and let your penis chill (literally).
Make sure you’re fully flaccid, not halfway to happy.
📏 Measure Like This:
Press a ruler against your pubic bone.
Measure the distance from the base of your penis to the tip (not just the visible part push gently into the fat pad).
Subtract 6 to 13 mm from that number. This creates a snug fit without crushing your crown jewels.
🍌 Cage Length Examples:
Flaccid Length (mm) | - 6 to 13 mm | Cage Length (mm) |
100 mm | -6 to 13 | 87 – 94 mm |
75 mm | -6 to 13 | 62 – 69 mm |
50 mm | -6 to 13 | 37 – 44 mm |
<50 mm | -6 to 13 | 25 – 31 mm |
🎯 Goal: A fit that says “I’m locked”, not “Call an ambulance.”
🧼 Bonus Tips for the Perfect Lock-Up
✔️ Choose the Right Material:
Plastic or resin: Lightweight and beginner-friendly.
Stainless steel: Heavier, durable, and seriously sexy.
Silicone: Flexible and forgiving ideal for travel or long-term wear.
✔️ Look for:
Ventilation holes for hygiene and airflow
Urination access (nobody wants a messy lockup)
Rounded edges and quality finish to avoid irritation
✔️ Test Before You Torment:
Don’t go full 24/7 on day one.
Try short sessions then build up to full-time denial, if that’s your vibe.
Monitor for redness, bruising, or tingling (bad signs, unless you’re into pain… and even then, be smart).
🔐 Final Thoughts: Fit First, Fantasy Second
Chastity play is all about control but comfort is key to long-term success. Measuring accurately ensures your sub stays locked, safe, and squirming in all the right ways.
At MoodTime, we stock a wide variety of chastity cages in South Africa, in all sizes, materials, and vibes. Whether you’re new to the kink or a keyholder ready to level up, we’ve got the gear — and the guidance — to help you lock it in.
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