Use your normal ring size only to pick the first sample to try.
Oura Ring 5 sizing guide
Oura says Ring 5 sizing is slightly different from Ring 4. If you know an old Ring 4 size, treat it only as a starting point and confirm with the Ring 5 sizing kit before ordering.
- Sizing system
- Proprietary whole numbers (redesigned interior)
- Size range
- Sizes 6–13
- Sizing kit
- Use the Oura Ring 5 sizing kit; do not rely on Ring 4 kit results as a final order size.
- Price
- Check Oura
Smart-ring advisor
Check smart-ring fit
Order-size check
Follow the brand kit because sensors need steady skin contact.
Wear the sample long enough to catch swelling, sleep, and hand-temperature changes.
Generation changes can alter interior shape or size range.
Does my normal ring size fit?
Oura says Ring 5 sizing is slightly different from Ring 4. If you know an old Ring 4 size, treat it only as a starting point and confirm with the Ring 5 sizing kit before ordering.
Use the ring size converter to find your standard size first — it's a useful starting point — but always confirm the Oura Ring 5 fit with the brand's sizing kit or sizing flow.
Frequently asked questions
Does my Oura Ring 4 size carry over to the Ring 5?
Not safely. Oura says Ring 5 sizing is slightly different from Ring 4, so use the Ring 5 sizing kit rather than auto-ordering the same number.
What sizes does the Oura Ring 5 come in?
Oura Ring 5 is listed in whole sizes 6 through 13.
Compare all devices on the smart ring sizing guide.