| US | UK/AU | EU | Ø mm | Circ mm |
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Cordial Jewelry
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Ring Size Tips
Measure at Night
Your fingers are largest in the evening. Measure then for the most accurate fit.
Consider Climate
Fingers expand in heat and shrink in cold. Measure at room temperature.
Wider Band = Tighter
Rings with wider bands (6mm+) fit tighter. Consider going up half a size.
Knuckle Test
The ring should slide over your knuckle with slight resistance — not too loose, not too tight.
Frequently Asked Questions
Match a Ring: Place a ring you already own on the circle and drag up/down to match its inner diameter. Measure Finger: Enter your finger's circumference in mm — we'll instantly convert. Size Chart: Browse all international sizes.
Always measure the specific finger you plan to wear the ring on. Ring sizes vary between fingers — your index and middle fingers are typically larger than your ring and pinky fingers.
If you're between sizes, go up half a size. A slightly looser ring can be resized down, while a tight ring is uncomfortable and harder to adjust.
US uses numbers (3–15), UK/AU use letters (A–Z+), EU uses circumference in mm (44–75). Our converter shows all standards.
Most rings can be resized 1–2 sizes, depending on design and metal. Rings with pavé stones may have limitations. Contact Cordial for guidance.
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