Black Silicone Interchangeable Strap

OPTION 1 - Conversion Table

If you already know your ring size, use our conversion table below:

OPTION 2 - Measuring Tape

Use a flexible measuring tape and wrap it snugly around your finger. The measurement in millimeters will correspond to your ring size.

For detailed instructions, refer to our instructional video above.

OPTION 3 - Using an existing ring

Measure your ring size accurately by using a ring you already own that fits the intended finger for your Hartley ring.

Download and print our PDF by clicking the button below (ensure printing on A4 paper at 100% scale).

This tool allows you to confirm your ring size by placing your ring on the provided guide.

OPTION 4 - Using our custom ruler

Download and print our PDF by clicking the button below (ensure printing on A4 paper at 100% scale).

Use scissors to cutout the ruler and follow the instructions on the page to determine your ring size.