Find Your Fit

The right size makes all the difference. Follow our guide to help find a cage and ring combination that will keep you both comfortable and securely trapped.

Please note that this calculator is a tool to help guide you, not definitive or final advice! Sizing for chastity can be tricky, and involve some trial and error — if you have any questions, email us at support@kink3d.com, or contact us via our contact form.

Measuring Flaccid Length

  1. 1

    Take off any cock rings, base rings, or supportive bands. Stand up (if able). Allow your penis to hang naturally while completely soft (don't hold on to it).

  2. 2

    Measure along the top, from base (where the shaft meets the body) to tip of the glans. If you have a foreskin, don't roll it back! But don't include it in the measurements either.

  3. 3

    Use a cloth tape measure or string (then measure the string) — you want to follow the curve of your penis!

  4. 4

    Measure multiple times over at least a day or two under normal conditions — not when very cold, and not fresh out of the bath.

If you're uncircumcised: measure to the end of your glans, not the end of your foreskin, without rolling anything back!

We're looking for the smallest length you get consistently, so you're going to want to measure at least six or seven different times — and more is better!

An illustration showing where to start and end the tape measure

Follow the curve of your penis with the tape measure

Measurement Calculator

Enter your measurements below. We need at least 6, but more is better!

0/6 minimum

Are you circumcised?

These results are recommendations based on your entered measurements -- actual sizing may vary. Please reach out via the form right underneath this calculator or directly to support@kink3d.com if you have questions!

KINK3D cages also come in three widths, Standard, Narrow, and Wide. We recommend most folks start with a Standard width cage. If you know your penis is either very thin or very thick when soft, go for one of the others! If you aren't sure, please reach out to us, and we'll help you assess.

Once you've run the calculator, we'll pre-fill your details below. Add anything else and send.

!

Don't measure for the base ring!

Measuring here can be misleading and often results in a ring that's too large. Instead, compare against other chastity base rings you've tried. If you haven't worn a chastity device before, the #2 or #3 Standard are our most common sizes — but be warned, you are pretty likely to have to try out a few rings to get this right. Use the contact form above or email us for detailed advice.

Ring styles

Standard
Start here!

8mm thick flat ring. Works for most people.

Best for: First-timers, general use.

XD

Extends forward 2mm. Tighter gap, more rigid.

Best for: Smaller balls, preventing ball escapes.

Curved

5mm backward curve at bottom.

Best for: Larger, heavier balls.

The ring style affects the gap between the base ring and cage: for detailed specifications, click here.