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📏 Nail your perfect fit before you buy—because precision is the new luxury.
The Oura Ring 4 Sizing Kit is a precision tool designed to help you find the exact ring size for optimal comfort and data accuracy. Unlike standard rings, Oura Ring 4 sizes differ, making this kit essential for a perfect fit. Compatible with all fingers and both hands, the kit ensures your smart ring tracks heart rate, sleep, and activity with maximum reliability. Plus, your sizing kit purchase includes a $10 credit toward your Oura Ring 4, making sizing a savvy first step in your wellness journey.
| ASIN | B0D9WVWXR1 |
| Additional Features | Heart Rate Monitor, Activity Tracker, Sleep Monitor |
| Band Material Type | Stainless Steel |
| Best Sellers Rank | #285 in Electronics ( See Top 100 in Electronics ) #3 in Smart Rings |
| Brand | OURA |
| Built-In Media | Oura Ring 4 Sizing Kit |
| Cellular Technology | Not supported |
| Color | Sizing Kit |
| Compatible Devices | Smartphone |
| Compatible Phone Models | Compatible with iOS and Android devices |
| Customer Reviews | 4.5 4.5 out of 5 stars (4,072) |
| Display Type | No Display |
| GPS Geotagging Functionality | No GPS |
| Human Interface Input | Unknown |
| Manufacturer | Oura |
| Metrics Measured | Heart Rate, Sleep Duration |
| Model Number | JZ98-54870 |
| Shape | Round |
| Style Name | Sizing Kit |
| Supported Application | Fitness Tracker, Sleep Monitor |
| Unit Count | 1 Count |
| Warranty Description | 1 Year Manufacturer |
| Warranty Type | Limited |
| Water Resistance Depth | 100 meters |
| Water Resistance Level | Waterproof |
| Wearable Computer Type | Smart Ring |
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