Engagement Ring Size — Get the Proposal Right
Secret sizing, which metals resize (and which never will), and the safest size to buy when you cannot measure — everything before you pop the question.
Last updated: November 2026
Size it secretly first
Start with the discreet methods in measure ring size secretly: borrow a ring worn on the correct finger, take a soap or tracing impression, and measure its inside diameter in mm. Cross-check with the average ring size — most women are US 6–7 — and verify on the on-screen sizer.
Choose a resizable design
- Resizable: plain or half-eternity bands in yellow, white or rose gold, and platinum — a jeweller can usually go one to two sizes either way.
- Hard or impossible to resize: full eternity bands, tension settings, tungsten, titanium and ceramic. For these, the size must be right at purchase.
- Ask before you buy: free first resizing, exchange window, and whether resizing affects any warranty.
When in doubt, size up slightly
A ring that is half a size large still goes on, stays on with a temporary sizing aid, and sizes down cleanly. A ring that is too small may not pass the knuckle at the proposal moment at all. Also remember wide bands fit tighter — add about half a size. General fit rules: how to measure ring size. Size charts: women's chart and full chart.