The Oura Ring 5 Sizing Kit allows for you and those around you to find the ideal fit before purchasing. Oura Ring sizes are slightly different from standard ring sizes, so it is important to size yourself using our sizing tools. A properly fitting Oura Ring will result in the highest possible data accuracy, comfort, and overall experience.
Important to note:
Sizes between OURA Ring 4 & 5 maybe different. It is highly recommend to select the respective sizing kits to avoid sizing discrepancies.
According to OURA’s internal data, approximately 30% of existing OURA Ring 4 users select a different size for OURA Ring 5.