How to choose your Oura Ring size

Oura Ring 5 is worn around the clock, so the size has to be right: a tight ring is uncomfortable, a loose one spins and the sensors read worse. That is what the sizing kit is for.

Published: 11 Oct 2026 · Trackzone Baku

Why your usual ring size does not work

Oura uses whole sizes only (no half sizes) and its scale differs slightly from standard ring sizes. Oura itself advises against sizing by other rings: they may use different measurements.

The ring's sensors should sit snug but comfortable on the finger. That is why the size is chosen with a sizing kit, not by eye.

How it works with us

How to measure with the kit (Oura's advice)

Which finger to wear it on

Oura says the ring is built for any finger: you choose the balance of comfort and style. Many people wear it on the index or middle finger. Consider which hand you use for lifting or gloves.

Important: pick the size for the finger you actually plan to wear it on. If you switch fingers later, the size may differ.

Common mistakes

To order the sizing kit or ask a question, message us on WhatsApp. Colors and prices: Oura Ring 5.

Sources: Oura's official sizing guidance (ouraring.com, support.ouraring.com), Trackzone Baku terms.