How does the sizing process for an Oura Ring work?

The sizing process for an Oura Ring is straightforward: customers start by ordering a free sizing kit from the Oura website. Once the kit arrives, it comprises a set of plastic sizer rings, which range from US sizes 6 to 13, ensuring a wide variety of fits for people with different finger sizes. The individual then wears the plastic ring that feels the most comfortable—typically for at least 24 hours—to account for natural variations in finger size that can occur throughout the day and night due to temperature changes, exercise, and other factors. It's essential to ensure that the selected size is snug enough not to fall off but loose enough to slide over the knuckle comfortably. After determining the appropriate size using the sizer kit, the customer then places an order for their actual Oura Ring in that specified size.