Choosing the right size for your **Aura Smart Ring™** is essential for both comfort and optimal health tracking. Follow this guide to ensure the perfect fit:

#### **Available Sizes:**
- **Size 8**: Diameter 18.1mm (Equivalent to U.S. Size 8)
- **Size 9**: Diameter 18.5mm (Equivalent to U.S. Size 9)
- **Size 10**: Diameter 19.8mm (Equivalent to U.S. Size 10)
- **Size 11**: Diameter 20.6mm (Equivalent to U.S. Size 11)
- **Size 12**: Diameter 21.4mm (Equivalent to U.S. Size 12)
- **Size 13**: Diameter 21.8mm (Equivalent to U.S. Size 13)

#### **How to Measure Your Ring Size Accurately:**

1. **Use a non-stretchable string or thin strip of paper.**
2. **Wrap it around the base of your finger, just below the knuckle.**
3. **Mark where the string or paper overlaps.**
4. **Lay the string or paper flat and measure the length in millimeters (mm) with a ruler.**
5. **Match the measurement to the size chart below:**

| **Ring Size** | **Diameter (mm)** | **Circumference (mm)** | **U.S. Size** |
|---------------|-------------------|------------------------|---------------|
| Size 8 | 18.1mm | 57.0mm | 8 |
| Size 9 | 18.5mm | 58.1mm | 9 |
| Size 10 | 19.8mm | 62.1mm | 10 |
| Size 11 | 20.6mm | 64.7mm | 11 |
| Size 12 | 21.4mm | 67.2mm | 12 |
| Size 13 | 21.8mm | 68.4mm | 13 |

#### **Helpful Tips for Accurate Measurement:**
- Measure your finger at the end of the day when it’s slightly larger.
- Ensure the ring can comfortably slide over your knuckle but still fit snugly around the base of your finger.
- If you’re in between sizes, we recommend sizing up for comfort.

**Important:** We do not offer exchanges or refunds for incorrect sizes, so please make sure to measure carefully before purchasing.