How to Use Our Ring Sizer App

Top tips for getting the perfect fit — every time.

Finding your ring size shouldn’t be a guessing game. Whether you’re treating yourself or buying for someone else, getting the size right is key — especially since not all rings can be resized. Luckily, The Diamond Store makes it easy with our free Ring Sizer App, plus expert tips to help you measure accurately at home.

Top Tips for Measuring Your Ring Size

Before you get started, keep these expert tips in mind:

– Use a Ring Sizer

The most accurate way to find your ring size is with a physical ring sizer. Good news: you don’t need to visit a jeweller. You can order a free ring sizer directly from The Diamond Store to ensure a precise fit.

– Measure the Right Finger

Each finger — and even each hand — can vary in size. Be sure to measure the exact finger where you plan to wear the ring.

– Measure at the Right Time

Fingers swell and shrink throughout the day. Always measure in the evening when your fingers are at their largest for the most reliable result.

– Avoid Cold Hands

Measuring cold fingers can lead to a size that’s too small. Make sure your hands are at room temperature.

– Check the Fit

A properly sized ring should slide over your knuckle with slight resistance and sit comfortably without spinning or slipping off.

– Precision Counts

Not all rings can be resized, so getting the size right the first time really matters — especially for surprise proposals or gifts.

How The Diamond Store’s Ring Sizer App Works

Finding your ring size has never been quicker — or more discreet. The Diamond Store’s free Ring Sizer App is designed to help you measure an existing ring using just your smartphone.

How to Use It:

  • Download the App – Search for The Diamond Store Ring Sizer on the App Store (iOS) or Google Play (Android).
  • Place a Ring on Your Screen – Take a ring that fits the intended finger, place it on your phone screen, and adjust the on-screen circle until it matches the inner edge.
  • Get Your Size – The app will display your UK ring size instantly — ready to shop with confidence.

Why Use the Ring Sizer App?

  • Quick & Easy – No special tools needed. Just your phone and a ring.
  • Perfect for Gifting – Great for measuring someone else’s size discreetly.
  • Great Starting Point – Ideal for getting an initial size estimate before ordering.

While the app offers a fast and convenient way to find your ring size, we always recommend confirming with a physical ring sizer if possible — especially for rings that can’t be resized or when sizing for a different finger.

Download the App Today

With the right tools and a few simple tips, finding your perfect fit is effortless. Whether you’re planning a surprise proposal or updating your jewellery collection, The Diamond Store’s Ring Sizer App is here to help — one tap closer to the perfect ring.