Choosing the correct ring size is the most important step to ensure comfort and accuracy in tracking. Whether you prefer using our AI sizing tool, a manual method, or our physical sizing kit — follow the steps below to find your ideal fit.

Choosing the Finger

Select the finger where you plan to wear your NAVA ring. The right choice is essential for comfort and functionality. We recommend wearing the ring on one of the following fingers: Index finger, Middle finger, Ring finger.

Measuring

Use Our AI Sizing Tool - quickly and easily, straight from your phone. All you need is a standard credit card, a blank A4 sheet of paper, and your hand. Simply follow the instructions to take a photo, and our app will accurately calculate your ring size for you. click here.

Measuring Manually -  We recommend verifying the result by also measuring your finger manually. Wrap a piece of string or a strip of paper around the base of your finger, measure the length in millimeters, and compare it to our Size chart.

Please note: NAVA rings are available in full sizes only. If your measurement falls between sizes, we recommend choosing the larger size. If you’re having trouble with manual measurement, feel free to contact us and we’ll be happy to assist you in finding your correct size.

Using the NAVA Sizing Kit 

This option is available only to customers who have purchased a ring, or who wish to order the sizing kit separately. The kit is shipped to your home and includes everything you need to measure your ring size accurately.

1. Select different sizing rings from the kit and place them on your chosen finger.

2. Keep the sizing ring on your finger for at least 24 hours, including during sleep, to ensure comfort throughout the day and night.

3. Choose the ring that feels secure but not tight, and comfortable for continuous wear. If your measurement falls between two sizes, we recommend choosing the smaller size for best performance and accuracy.

Submitting Your Size

If you have already placed an order, send us your chosen ring size via email or WhatsApp using the QR codes, along with your name and order number.
If you haven’t placed an order yet, click here to select your NAVA ring. 

If you want to purchase a NAVA sizing kit, click here to order.

Important Notes

Free size exchange on your first order is available only for customers who purchased the NAVA sizing kit, and is subject to our return policy.
The NAVA sizing kit is available exclusively in Israel and will be availabl - starting October 2025.
We do not take any responsibility for self-measurement methods, and the free size exchange option does not apply to manual sizing.