How to Measure Ring Size at Home

Shopping for a ring should feel joyful—not stressful. Yet one of the biggest questions we hear is: “How do I know my ring size?”
Whether you’re treating yourself or surprising someone special, the right fit makes all the difference.

That’s why we’ve put together this guide on how to measure ring size (including easy methods you can try at home). With these tips, you’ll feel confident choosing the size that’s just right for you.

Why Ring Size Matters

Rings aren’t just accessories—they’re personal pieces tied to special memories and milestones. A size too small feels tight and uncomfortable, while a size too big risks slipping away. The right fit means your jewelry not only looks beautiful but also feels effortless to wear.

At OBY Jewelry, we want every piece to become part of your story from the moment you slip it on. That starts with getting the size right.

How to Measure Ring Size

Here are three simple, tried-and-true ways to figure out your ring size:

Measure a Ring You Already Own

• Pick a ring that fits the same finger you’re buying for.
• Measure the inside diameter with a ruler or caliper.
• Match the millimeter measurement to a ring size chart.

Use String or Paper

• Wrap a thin strip of paper or string around your finger.
• Mark where it overlaps.
• Measure the strip in millimeters and compare it to a size chart.

Order a Ring Sizer

• Plastic or metal ring sizer tools are affordable and accurate.
• They work just like a jeweler’s professional sizing bands.

How to Measure Ring Size at Home: Extra Tips

Measure in the evening: Fingers can swell during the day, so evening measurements tend to be most accurate.

• Try both hands: Your dominant hand may be slightly larger.
• Consider band width: Wider bands fit more snugly; you may want to size up.
• Double-check: Measure twice to confirm consistency.

With these tips, finding your size at home is simple and reliable.

International Ring Sizes

One detail many people miss: ring sizes vary around the world. The U.S., U.K., Europe, and Asia each use different systems. If you’re shopping globally, always cross-check with a conversion chart.

OBY Jewelry follows U.S. sizing but can help with conversions if needed—just reach out and we’ll guide you.

Perfect Fit Meets Sustainable Design

We design our rings in recycled S925 silver, 18k gold vermeil, and lab-grown diamonds and gemstones. That means every ring is crafted with comfort, durability, and responsibility in mind.

Some OBY favorites that come in multiple sizes include:

Emerald Half Pave Ring
 – Sleek green sparkle for everyday wear.

Ruby Heart Ring
 – Bold, meaningful, and full of passion.

Learning how to measure ring size at home doesn’t have to be complicated. With a little string, a favorite ring, or a simple ring sizer tool, you can find your perfect fit.

At OBY, we believe jewelry should fit seamlessly into your life—designed to shine with you through every moment.