Please note: This cage is narrow! 

Dimensions: 

Short tube: Length:  53mm/2.08inch |
Inner diameter Wide: 29mm/1.14inch by 31mm/1.22inch

Medium tube: Length: - 65mm/2.55inch | Wide 
Inner diameter Wide: 25mm/0.98inch by 40mm/1.57inch

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Under Seal is not about force.

It’s about decision.

Designed for those who choose restraint as a state of being, Under Seal encloses with purpose—smooth, sculpted, and uncompromisingly secure. Once locked, it becomes a quiet constant: always present, always felt, never loud.

The flowing, enclosed form is engineered for continuous wear, eliminating sharp edges and pressure points while maintaining a firm, unmistakable sense of containment. Dual sculpted rings cradle and guide, creating a balanced hold that feels intentional rather than restrictive—controlled, not crude.

This is chastity refined into an object of commitment.

No distractions. No access. No ambiguity.

The integrated locking system seals the experience physically and mentally. The key is removed, the choice is complete, and what remains is a steady awareness—subtle, grounding, and deeply personal.

Under Seal disappears under clothing, yet never fully leaves the mind.

It’s worn through days, routines, and moments of weakness as a reminder of the promise made.

Locked not for punishment.

Sealed by consent.

Held in quiet control.

FIND YOUR IDEAL SIZE THANKS TO OUR AI: 

SIZE CALCULATOR

Measure manually for the base ring

Measure the circumference around your cock from behind the balls. You can use a fabric tape measure (the kind dressmakers use) to get the measurement, or, if you don’t have one, you can use a piece of string and a ruler. Wrap the tape measure or string around your cock, going behind the balls. The tape should be snug but not tight.

Now you have your circumference you need to divide it by 3.14 to get the diameter. We’ve done some sample calculations below to show you how it works:

In imperial:7 inches ÷ 3.14 = 2.25 inches diameter
6.25 inches ÷ 3.14 = 2 inches diameter
5.5 inches ÷ 3.14 = 1.75 inches diameter
4.7 inches ÷ 3.14 = 1.5 inches diameter