# Selecting the Ideal Finger for Your Oura Ring 4: A Detailed Guide
The Oura Ring 4 is an advanced health and wellness monitoring device that features a stylish titanium construction, upgraded sensors, and an impressive battery life of up to 8 days. Although Oura asserts that the ring “is functional on any finger” and “on both hands,” determining the right finger for optimal functionality can be challenging. This article aims to assist you in identifying the most suitable finger for your Oura Ring 4, ensuring accurate data collection and a comfortable feel.
## Which Finger Should You Use for the Oura Ring 4?
### Oura’s Recommended Guidelines
As per Oura’s official [sizing guide](https://ouraring.com/sizing), the Oura Ring 4 can be donned on any finger. Nonetheless, for maximum performance, they suggest wearing it on the **index, middle, or ring finger**. These fingers typically offer more stability and a snug fit, which is vital for precise measurements.
On their [support page](https://support.ouraring.com/hc/en-us/articles/360025590653-Tips-for-Determining-Your-Oura-Ring-Size), Oura notes that the **index finger** is the preferred choice, followed closely by the middle and ring fingers. They recommend steering clear of fingers with prominent knuckles, as this can complicate the size selection and lead to the ring potentially getting stuck.
### Insights from Experts
Oura team members have recommended placing the Oura Ring 4 on your **non-dominant index finger** to achieve the most reliable fit. This is attributed to the non-dominant hand’s lesser susceptibility to swelling or size changes caused by regular activities, which can impact the fit and measurement accuracy of the ring.
If you find yourself on the size threshold with your index finger, opting for a different finger with a snugger fit is advisable, even if it’s not your index finger.
## Determining the Right Oura Ring 4 Finger and Size for You
### The Significance of Finger Selection
The Oura Ring 4 is equipped with sophisticated sensors that monitor heart rate, blood oxygen saturation, sleep patterns, stress levels, and daily readiness. To ensure that these sensors function optimally, the ring must fit securely on your finger without being excessively tight or loose. An improper fit could result in erroneous data, particularly during physical activities or sleep.
### How to Select the Right Finger
1. **Begin with the Non-Dominant Hand**: It is generally advisable to wear the ring on your non-dominant hand. Right-handed users should consider the left hand, as the dominant hand tends to engage in actions like cooking, typing, or using tools that could lead to the ring becoming soiled or marked.
2. **Start with the Index Finger**: For most users, the index finger is the optimal choice. It experiences less variation in size throughout the day and provides a stable base for the ring’s sensors to capture accurate data.
3. **Evaluate the Middle or Ring Finger as Alternatives**: If the fit on the index finger isn’t ideal, the middle or ring finger can serve as alternatives. However, exercise caution if you have larger knuckles, as that may complicate size fitting.
4. **Steer Clear of the Pinky and Thumb**: These fingers are usually not suitable for the Oura Ring 4. The pinky is too small, while the thumb’s unique shape and size can hinder the ring’s data collection capabilities.
### The Necessity of Proper Sizing
Selecting the correct size is equally as important as choosing the appropriate finger. The Oura Ring 4 features a new titanium construction and upgraded sensors, resulting in minor size variations compared to earlier models. Therefore, you’ll need to utilize the updated sizing kit for an accurate measurement.
While certain retailers such as Best Buy provide in-store sizing, it’s recommended to wear the dummy ring sizer for **24 hours**. This is important because your finger’s size can fluctuate throughout the day due to variables like temperature, activity, and hydration. A ring that feels snug during daytime may become uncomfortable at night or too loose for precise measurements.
### Adapting to Different Situations with Your Fingers
Fingers may swell during exercise due to increased blood circulation or at night due to sleeping posture, arthritis, or other health issues. In such instances, feel free to transfer the Oura Ring 4 to another finger or even a different hand to ensure a proper fit. Just ensure you have a primary finger where the ring remains comfortable throughout most of the day.
## Useful Tips for Wearing the Oura Ring 4
1. **Don It on Your Non-Dominant Hand**: This minimizes the likelihood of the ring getting dirty or scratched during everyday tasks.
2. **First Try the Left Index Finger**: This is the most recommended finger for
