ELARA | Seren Smart Ring

Sale price£129.99
Colour: Brushed Silver
How to Measure Your Ring Size at Home

Find Your Perfect Ring Size

Getting the right ring size is essential for comfort and proper functionality of your ELARA smart ring. Follow these simple steps to measure your ring size at home.

How to Measure

What you'll need:

  • A piece of string, ribbon, or paper strip
  • A pen or marker
  • A ruler (preferably with millimeter measurements)

Steps:

  1. Wrap the string or paper strip around the base of your finger (the finger you plan to wear the ring on)
  2. Mark the point where the string or paper overlaps to form a complete circle
  3. Measure the length from the start to the mark in millimeters
  4. Use the measurement chart below to find your ring size

ELARA Ring Size Chart

Size Inner Diameter (mm) Inner Circumference (mm)
6 16.5 52
7 17.5 55
8 18.2 57
9 19.1 60
10 20.1 63
11 20.7 65
12 21.7 68
13 22.3 70

Important Tips

  • Measure at the end of the day: Fingers tend to be slightly larger in the evening
  • Temperature matters: Cold fingers are smaller, so measure when your hands are at a normal temperature
  • Measure multiple times: Take 2-3 measurements to ensure accuracy
  • Consider the width: Wider rings fit more snugly, so you may need to go up half a size
  • Between sizes? We recommend choosing the larger size for comfort, for example, if the perimeter of your finger is 58mm, we would suggest size 9.
  • Note: Smart rings may fit differently than traditional jewelry rings, so measuring your finger directly is the most accurate method

Still Not Sure?

If you're uncertain about your ring size, we recommend ordering our Ring Sizer Kit with your purchase. We'll send the kit to you first, you can confirm your perfect size, and then we'll ship your ring.

Have questions? Contact us and we'll be happy to help!

ELARA sizing is unique - please don't order based on your usual jewellery ring size

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Heart Health

Stress

Activity & Movement

Sleep & Rest

Women's Health

Free Shipping

On all smart rings

Secure Payment

100% protected checkout

Premium Quality

Handcrafted excellence

Customer Care

24/7 support available

Why Choose ELARA?

Feature ELARA Seren Smart Ring Standard High-End Wearables
Subscription Fees Zero. No monthly fees or hidden costs. Often requires a £5-£10 monthly sub.
Price Point £129.99. Mid-range luxury price. Typically £350 - £450+.
Material Titanium Alloy. Ultra-light Often heavier plastic or stainless steel.
Sizing Certainty Free Sizing Kit. Confirm before we ship. Often requires self-measuring.
Charging Dual Option. Magnetic Case + Alternate Cable. Usually a single proprietary dock.

Technical Specifications

Technical Specifications

What's Included

Seren Smart Ring
Portable charging case
Magnetic USB-C ring charging cable
USB-C charging cable
Midnight Black Silicone Ring Protector

Compatibility

Available on iOS and Android
SHR Ring app syncs with Apple Health, Google Health and Strava
Free app, no subscription

Sensors

Heart rate and heart rate variability
Blood oxygen (SpO2)
Temperature trends
24/7 movement and activity tracking

Battery

Battery Capacity: 15mAh
Battery Type: Lithium-polymer (Li-Po)

Charging

One charge lasts up to 5-7 days of battery life, depending on ring size and usage
Charges in about 60 minutes, depending on battery level