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Welcome to Leader Radio Technologies
Welcome to Leader Radio Technologies
Oura Ring 4 -Sizing Kit -

Oura Ring 4 -Sizing Kit -

by OURA
$100.00 - $100.00
$100.00
$100.00 - $100.00
$100.00

．CHOOSE A FINGER - Oura Ring 4 works on all fingers. Make sure to size the finger you plan to wear your Oura Ring on. For optimal performance and accuracy, we recommend wearing your Oura Ring on your index, middle, or ring finger.

．FIND YOUR FIT - Oura Ring 4 should fit snug around the base of your finger, but not to the point where it’s uncomfortable. When sizing yourself, the ring must fit over the largest part of your finger, like your knuckle.

．SIZES - Oura Ring 4 is available in sizes 4–15, and we currently do not offer half-sizes. Oura Ring sizes are slightly different from standard ring sizes, so you should not assume your ring size.

．MATERIALS - Our sizing rings are made of plastic, while the Oura Ring 4 is crafted in full titanium for comfort. Due to the plastic mold used to make our ring sizers, they may seem less comfortable than the actual Oura Ring you’ll end up receiving.

*The sizing kit is considered a consumable item and is non-refundable and non-returnable.
Find Your Ideal Fit

Our plastic sizers are designed to guide your size selection, but they don’t reflect the quality, feel, or weight of the final Oura Ring.

1. Open Your Sizing Kit

Inside your sizing kit, you’ll find multiple plastic ring sizers). Oura uses only whole sizes (no half sizes) and they differ slightly from standard US ring sizes, so it’s important to test with our sizers even if you "know"” your usual ring size. Avoid sizing your Oura Ring based on other rings, as they likely use different measurements.

Oura Ring and ring sizers are the same width and circumference. However, the Oura Ring itself weighs slightly more due to material differences.

2. Choose Your Finger

You can wear your Oura Ring on any finger, but for the best accuracy, we recommend your index finger. The middle or ring finger also works well, just try to avoid fingers where the knuckle is much wider than the base.

Try the sizers on both hands and different fingers to find the most comfortable fit. If your finger size ever changes, you can move the ring to another finger or hand as long as it fits snugly.

3. Check Ring Orientation

Oura Ring 4 Wear the ring sizer with the size number visible on the top of the hand.

4. Test for Comfort

Your Oura Ring should feel snug, not tight. It should stay securely at the base of your finger and come off with a bit of soap and water, but not slide off easily.

Make a fist: If you see a gap between the ring and the top of your finger, try a smaller size.

5. Wear it for at Least 24 Hours

Fingers change size throughout the day and night. Wear the sizer for a full day, including while you sleep, to make sure it still feels right during different activities.

Stuck Between Sizes?

We recommend choosing the smaller size for a few reasons:

  • The sensors inside your Oura Ring work best when they stay in close contact with your skin, especially the underside of your finger
  • A snug fit helps keep your data accurate and your experience consistent
  • Our plastic sizers can feel a bit "stickier" on your skin, so the actual Oura Ring may fit more smoothly.
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