Ring Size Guide

The most accurate way to determine your ring size is to visit a local jeweler or jewelry store, where a professional can measure your finger precisely — often more reliably than at-home methods.

However, if you prefer to measure your ring size at home, these step-by-step options help you determine your ring size with confidence, ensuring your ring feels comfortable and secure for everyday wear.

Ring Sizer - GemsMagic

1. Use Our Professional Ring Sizer

For the most accurate results, we recommend using a professional ring sizer. Unlike paper or string measurements, a ring sizer lets you test the fit directly on your finger, helping you find a comfortable and precise size before placing your order.

You can purchase our sizing tool here: GemsMagic Ring Sizer

Reusable and easy to use, it’s the most reliable way to measure your ring size at home.

2. Size Chart

All of our rings are made in standard US ring sizes. Use the chart below to see how US sizes correspond to finger circumference and to convert them to international sizing systems.

Please note that for ring sizes above 11 US, an additional charge of $150 per size will apply.

How to Measure Your Ring Size at Home

Measure Your Finger with Paper or String

This is the simplest way to estimate your ring size using items you already have at home.

What you'll need

  • A thin strip of paper or string
  • A pen
  • A ruler with millimeter markings

Steps

  1. Wrap the paper or string around the base of your finger where the ring will sit.
  2. Mark the point where the ends overlap.
  3. Lay the strip flat and measure the length in millimeters.
  4. Compare the measurement with a ring size chart to determine your US ring size.

This method is quick and convenient for a general estimate.

Measure an Existing Ring

If you already have a ring that fits the intended finger, you can use it to determine your size.

Steps

  1. Choose a ring that fits comfortably on the correct finger.
  2. Measure the inner diameter of the ring in millimeters.
  3. Compare the measurement with a ring size chart to find the corresponding US ring size.

Tips for Accurate Ring Sizing

For the best results, keep these tips in mind:

  • Measure your finger at the end of the day, when it is slightly larger.
  • Avoid measuring when your hands are cold, as fingers tend to shrink.
  • Measure 2–3 times to ensure accuracy.
  • If your knuckle is larger than the base of your finger, choose a size that can slide over the knuckle comfortably.
  • Wider ring bands may fit tighter, so you may want to consider going half a size larger.

Even a small difference in measurement can affect the comfort of a ring worn daily.