Finding Your Perfect Fit

Choosing the correct size is essential for both comfort and accurate biometric tracking. The Arvion™ Smart Ring is designed to be worn all day and night, so selecting the right fit ensures the sensors remain in consistent contact with your finger.

A properly fitted ring should feel secure but comfortable — snug enough that it does not rotate freely, yet loose enough to slide off without discomfort.

Standard US Ring Sizes

Arvion™ Smart Rings are manufactured using standard US ring sizing, the most widely used measurement system for rings worldwide.

If you already know your US ring size, you can simply select the corresponding size when ordering. If you are used to UK or EU ring sizes, you may need to convert your size using a standard ring size conversion chart.

Using standard sizing ensures the Arvion™ Smart Ring fits similarly to other rings you may already own.

How to Measure Your Ring Size

There are a few simple ways to determine your correct size:

1. Measure an Existing Ring

If you already own a ring that fits comfortably, you can measure its inner diameter and compare it with a standard ring sizing chart.

2. Use a Printable Ring Sizer

A printable ring sizer allows you to place an existing ring over a set of measurement circles to find the closest match.

3. Measure Your Finger

Wrap a small strip of paper or string around the base of your finger. Mark where the ends meet, measure the length in millimetres, and compare the measurement with a standard ring size chart.

Why Proper Fit Matters

The sensors inside the Arvion™ Smart Ring rely on consistent skin contact to measure biometrics such as heart rate, sleep patterns, and recovery trends. A properly fitted ring helps ensure the device can capture accurate readings while remaining comfortable enough to wear throughout the day and night.