How can I determine the correct size for an Oura Ring?

To determine the correct size for an Oura Ring, one should initiate by requesting a free sizing kit from the Oura website. Upon receiving the sizing kit, which includes a set of plastic sizers similar in design to the actual ring, one should try on various sizes to find the most comfortable fit. It is recommended to wear the plastic sizer for at least 24 hours, as finger size can fluctuate throughout the day due to various factors such as temperature and physical activity. Pay attention to how the sizer feels during different activities and times of day. The proper size should feel snug but comfortable—tight enough not to slide off easily while loose enough to slide over the knuckle without resistance. Once confident with the chosen size, use that information to order the corresponding Oura Ring. Remember that proper sizing is crucial for accurate readings, as the sensors must maintain consistent contact with the skin.