Size Large Chastity Cage U-Ring

$18.00

Color:

All CB-X chastity kits include u-ring sizes #1-5. Those who may need to size up from the largest (#1) u-ring included in a kit should consider purchasing this size Large u-ring with an inner diameter of 2 ⅛ inches.

Product details:

  • Includes one size Large u-ring
  • Available in black, pink, or clear
  • Compatible and interchangeable with all CB-X penis chastity cages

Measurements:

  • Inner diameter 2 ⅛ inches (54mm)

Material:

  • Made from lightweight, medical-grade polycarbonate plastic

For a bigger size, shop the Size X-Large U-Ring.  If you're unsure which larger-sized ring is best for your fit, consider purchasing both the Large and X-large, which are sold in a 2-pack (includes: 1 x Large, 1 x XL).

Prior to purchasing, review our Size Guide for assistance in measuring your base circumference.

CB-X chastity kit parts are interchangeable with all CB-X cock cages so you can mix and match your complete chastity cage kit with any other CB-X chastity cage that we offer.

Accurately measuring penis length and diameter will help ensure the correct chastity cage size. The two main factors to consider when choosing a cock cage are 1) anatomy size and 2) fit preference. To achieve a tighter, more restrictive fit, exact measurements might not be as relevant. 

Step 1: Follow the step-by-step Chastity Sizing Guide

Step 2: Review CB-X Chastity Tips

Step 3: Read our Shipping Policy 

Not sure how to install a CB-X chastity device? Click here for our instructional video. Feel free to email customerservice@cb-x.com with any questions. Unsolicited photos are restricted. 

Medical-Grade Materials

Customizable Fit

Discreet Packaging

Trusted For 25+ Years

single CB-X clear Large u-ring with CBX logo imprint on ring

Size Large Chastity Cage U-Ring

$18.00

$18.00

Chastity Kit Parts

Cock Cage

Premium, durable, comfortable chastity cock cage in your selected size.

U-Rings

Five sizing u-rings are provided in a kit for customizing your fit.

Locking Pins

Multiple locking pin lengths to customize the fit.

Spacers

Multiple spacer lengths (corresponding to locking pins) are provided for a custom fit.

Locks

Kit also includes a brass lock with two keys, and five one-time-use individually numbered plastic locks.

Key Features

Medical-Grade Materials

Lightweight, hygienic, durable materials safe for extended wear.

Customizable Fit

Five u-ring sizes and multiple spacers for a customizable and secure fit.

Discreet Experience

Unmarked packaging, private billing, and TSA-friendly travel lock options.

Researched Design

Vented for hygiene, functional opening for urination, and secure locking mechanism.

Frequently Asked Questions

What is a U-ring?

The U-Ring is the base component that fits behind and around the scrotum, including the base of the penis, which creates the foundation of the chastity device to be securely attached to your body. Available in multiple sizes to accommodate different anatomies and colors to match your chastity cage. All u-rings are made of medical-grade polycarbonate or body-safe ABS plastic for security and durability.

Who Needs a U-ring?

  • Users who need a different size than what came with their kit.
  • Those who want extra u-rings for convenience.
  • Users who have lost or damaged their original ring.
  • Those needing larger sizes beyond the standard U-ring sizes provided in a CB-X kit.

Choosing the Right U-ring

Standard U-ring sizes included in every kit (measurement is the inner diameter of each ring):

  • #1: 2" (50.8mm) - Largest standard size.
  • #2: 1⅞" (47.63mm)
  • #3: 1¾" (44.45mm)
  • #4: 1⅝" (41.28mm)
  • #5: 1½" (38.1mm) - Smallest standard size.

Larger options sold separately:

  • Large: 2⅛" (54.0mm)
  • X-Large: 2¼" (57.2mm) - Largest U-ring available.
  • Sold in a two-pack or individually

How do I determine the correct U-ring size?

The U-ring should fit snugly behind the testicles without causing discomfort or restricting blood flow. If you experience discomfort using the standard U-ring sizes included in your kit, consider purchasing a larger size (sold separately).

Can I use U-rings from different models?

Yes, all CB-X U-rings are interchangeable between models.

What if none of the included U-rings fit me?

We offer two additional, larger-sized U-rings: Large 2⅛" and X-large 2¼". These are available separately. You can find them under Chastity / Kit Parts / U-rings from the main menu.

Do I need to measure for a U-ring separately?

While our sizing guide focuses on cage length and diameter, the correct U-ring size is equally important. Start with the largest ring and work your way down in size, using the five provided U-rings in your kit to find the most secure yet comfortable fit. If you believe your anatomy to be larger than the #1 U-ring will accommodate, please measure before purchase and add the Large or XL u-ring to your CB-X kit.

How tight should the U-Ring be?

The U-ring should be snug enough to prevent removal but not so tight that it causes pain, skin discoloration, loss of blood flow, or numbness.

How do I install the U-Ring?

Place the U-Ring under and behind the scrotum so it's snug with the scrotum and base of the penis. Attach Base #1 to the U-Ring with the pins facing away from the body. Slide Base #2 onto the pins to snap the three parts together, completing the base ring, which forms the foundation of the chastity device.

Available U-ring Options:

  • Sizes: Five standard sizes (I.D. 1½" to 2") included in a complete kit.
  • Additional Large (I.D. 2⅛") and X-Large (I.D. 2¼") are sold separately.
  • Colors: clear, pink, black, and other colors to match cage colors.