How to Measure Smart Ring Size

Orbit Ring 2 Smart Ring: Ultimate Health & Fitness Tracker

Elevate your wellness journey with the Orbit Ring 2—the ultimate fusion of cutting-edge technology, sleek design, and all-day comfort. Engineered to monitor your sleep quality, daily activity, heart rate, and body recovery in real time, the Orbit Ring 2 puts personalized health insights right at your fingertips.

Because smart rings house internal health-tracking sensors, getting the right fit is key for both accurate sensor readings and seamless, 24/7 comfort.

Why Perfect Fit Matters for Orbit Ring 2

Unlike standard fashion rings, smart rings feature high-precision optical sensors along the inner rim.

  • Too Loose: Sensors may lose skin contact, affecting health and sleep tracking accuracy.

  • Too Tight: Restricts circulation, especially during sleep or workouts when fingers naturally swell.

Pro Tip: Smart rings generally cannot be resized due to internal electronics. Measuring your finger correctly before placing an order ensures optimal performance and long-lasting comfort.

How to Find Your Orbit Ring 2 Size

  1. Measure an Existing Ring: Select a ring that fits your target finger comfortably. Measure the inside diameter (widest point across the inside) using a ruler.

  2. Measure Your Finger directly: Wrap a narrow strip of paper or string around the base of your finger. Mark where it overlaps, then measure the total length in millimeters to determine your circumference.

  3. Best Finger for Smart Rings: For the most reliable sensor tracking, we recommend wearing your Orbit Ring 2 on your index, middle, or ring finger.

Orbit Ring 2 Size Conversion Chart

(Matches standard US Ring Sizes to Diameter and Circumference)

US Ring Size Inner Diameter (mm) Inner Circumference (mm) Inner Diameter (in) Inner Circumference (in)
5 15.7 49.3 0.62 1.94
6 16.5 51.8 0.65 2.04
7 17.3 54.3 0.68 2.14
8 18.1 56.9 0.71 2.24
9 18.9 59.4 0.75 2.34
10 19.8 62.2 0.78 2.44
11 20.6 64.7 0.81 2.54
12 21.4 67.2 0.84 2.65
13 22.2 69.7 0.87 2.75
14 23.0 72.3 0.91 2.85
15 23.8 74.8 0.94 2.95

Sizing Tips for the Best Experience

  • Measure at Room Temperature: Avoid measuring first thing in the morning, immediately after exercise, or when cold, as fingers fluctuate in size.

  • In-Between Sizes: If you fall between two sizes, we recommend sizing up to accommodate normal finger swelling throughout the day and during exercise.

  • Knuckle Clearance: Make sure the size you choose slides smoothly over your knuckle without excessive resistance.