Quick Answer

Measure the circumference of your flaccid penis at the base and the widest part of the shaft, then measure the diameter of your scrotum above the testicles. Use these numbers to pick a cage length, diameter, and ring size. Always choose a ring that fits snugly without cutting circulation.

What You Need Before You Start

Grab a flexible measuring tape, a ruler, and a piece of string if you don’t have a tape. Measure when you are completely flaccid and at room temperature—cold or arousal will throw off the numbers. Write down each measurement immediately so you don’t mix them up.

Common Sizing Mistakes to Avoid

The biggest error is choosing a cage that is too long. A cage should be slightly shorter than your flaccid length to prevent the head from retracting inside. Another frequent mistake is picking a ring that is too loose, which allows the cage to slip off, or too tight, which restricts blood flow. Always test the ring size for at least 10 minutes before wearing the full cage.

Step-by-Step Measuring Guide

  1. Measure Cage Length: While flaccid, press a ruler against your pubic bone and measure from the base of your penis to the tip. Subtract 1/4 to 1/2 inch from that number—the cage should be slightly shorter than your flaccid length. Checkpoint: If the cage is longer than your flaccid length, you risk the head pulling back inside, which can cause discomfort.
  2. Measure Cage Diameter: Wrap the measuring tape around the widest part of your flaccid shaft. Divide that circumference by 3.14 to get the diameter. The cage should match that diameter or be 1-2 mm wider. Checkpoint: A cage that is too narrow will pinch; one that is too wide allows chafing.
  3. Measure Ring Size: Use a string to measure the circumference of your scrotum just above the testicles, where the ring will sit. Add 1/4 inch for comfort, then divide by 3.14 to get the ring diameter. Common ring sizes range from 38 mm to 50 mm. Checkpoint: The ring should be snug enough that you cannot pull the cage off, but loose enough to slide one finger underneath.
  4. Test the Fit Before Full Wear: Put on only the ring for 10-15 minutes. If you feel numbness, tingling, or discoloration, the ring is too tight. If it slides off easily, it is too loose. Once the ring fits, attach the cage and wear it for an hour before going longer. Next step: Gradually increase wear time over several days, checking skin condition each time.

Product Fact: Man Cage Chastity Cock Cage Model 04

  • Man Cage Chastity Cock Cage Model 04 Clear 4.5 Inch / 11.5cm: The Man Cage Chastity Cage Model 04 is made from high-grade polycarbonate, a lightweight, durable, and hypoallergenic material. It comes with multiple ring sizes and a three-part design with guidance pins for a secure fit. Multiple ring sizes let you adjust the fit after measuring, and the hypoallergenic material reduces skin irritation during long-term wear.