About MyRingSize

MyRingSize is a small, free tool for one job: turning a ring measurement into the right size in any system — US, UK, EU or Japanese — without guesswork.

Every conversion on this site is built from published millimetre measurements that follow ISO 8653, the standard under which the EU size is simply a ring's inner circumference in millimetres. UK letter sizes are labelled as approximations throughout, because that is what they are: a jeweller's convention that can differ slightly between makers. Where a figure is a broad statistic rather than a measurement — the average sizes, for example — the page says so.

The on-screen sizer asks you to calibrate with a bank card before trusting its circle, and the printable sizer includes a verification bar for the same reason: a size tool that is quietly wrong is worse than none. Nothing you type or measure here is sent anywhere — the tools run entirely in your browser.

MyRingSize is made by ORBITFRAME, an independent web studio. A Pro version ($9/mo, coming soon) is planned with saved measurements and printable jeweller worksheets; it is a preview only and nothing is charged today. Questions or corrections are welcome via the portfolio at orbitframe-studio.pages.dev.