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How to Measure your Ring Size at Home

Learn how to measure your ring size at home with our free ring sizer and these three easy steps.

Measuring your ring size is trickier than it sounds. Your fingers fluctuate in size from day to day and season to season. Warm weather makes them plumper. Pizza night or a sodium loaded burrito will temporarily swell them up. A dip in the pool will shrink them down. Your finger size isn’t constant, and it depends on what you’re doing, and what kind of environment you’re doing it in. You’ll want any ring you purchase to fit you well, so how can you measure your ring size with confidence? And can you do it without leaving the house?

Option No. 1 — DIY

Use a Piece of String to Measure Your Ring Size

If you’re like most of us, you floss. Tying a piece of floss or string around your finger is a fairly easy way to figure out your ring size.

What you’ll need: a piece of dental floss or string, a ruler (preferably with centimeters on it) and a fine point marker or felt tip pin. The finer tipped the better.

Cocofloss – perfect for measuring your ring size and avoiding pesky cavities
A ruler – don’t have one? How about a tape measure?
A sharpie – also good for doodling your dream ring

How to Do It

You’ll want to measure your ring size in the afternoon, ideally between lunch and dinner. This time of day is when your fingers are largest.

First, wrap the string around your ring finger, and tighten until it fits comfortably. Get out your marker and draw a dot where the string overlaps. Line the pice of string up against the ruler and measure the length in millimeters. If your ruler doesn’t have millimeters here’s an online measurement converter use can use to convert from inches.

Potential Pitfalls

If you used a stretchy string or floss brand, make sure you don’t tighten the knot too much when measuring your finger. Pulling the string too tight can mislead you to think that your ring size is smaller than it is.

Make sure to use a finely tipped marker or pen. If the ink bleeds into the string much, or the mark is too wide, it’ll be tough to measure it accurately.

Strings are flexible. Rings are not. Even when this method is done perfectly, it’s slightly less accurate than trying on a ring. This method is OK as a starting point, not recommended for an accurate size result.

Option No. 2 — For The Jewelry Lover

Measure Your Other Rings

If you love rings as much as we do, you likely own some already. But, you may not know what size they are. Fear not! Below you’ll find a printable, life-size ring chart that you can print out and use to measure your ring size. Select a ring from your collection that fits comfortably, and line it up with its matching circle on the chart. Voila! You’re done.

How to Use Ring Size Chart

01. Print and calibrate the diagram by measuring the ruler at the bottom.

02. Place your ring over the circles.

03. Match the inside edge of your ring with the closest circle.

04. When it doubt size up.

Printable ring sizing chart for ring sizes 3 through 13

Option No. 3 — For the Perfectionist

Order our free try at home kit

For most rings, getting it resized is easy, and either free, or very affordable. But, some rings, like eternity bands, can’t be resized. Even if they can, it’s another chore you’d rather not do. Our try at home kit comes with a free ring sizer which makes sizing your finger a snap. Why not take it for a test drive?

Woman measuring their ring finger with a plastic ring sizer


No one wants their ring to fall off and get lost accidentally. For many, especially those of us with smaller knuckles, a tight-fitting ring is preferable to a loose-fitting one. How tight is too tight? A too-tight ring might not seem like a big deal, but it can lead to severe complications (like a loss in blood circulation)  and should be addressed quickly. Before you end up in the hospital having your ring cut off, it’s good to use these simple tests to ensure your perfect fit is still as perfect as it started out.

Here are three simple tips you can use when you’re deciding if you should have your ring resized or are getting ready to measure your size at home.

Twist your Ring from Side to Side

Your ring spinning on your finger may seem like a nuisance, but you should be able to twist your ring clockwise and counterclockwise with little effort and without the skin sticking. If you can’t do this, it’s too tight.

Take it Off

If you can’t remove your ring, you need to get it resized ASAP. In the interim, ice your finger, slip a piece of dental floss beneath the ring, dip your finger in olive oil, and gently pull on the floss until the ring comes off. If it still doesn’t come off, it may be time to call the doctor.

Check if Your Ring Lays Flat on Your Finger

Rings are meant to fit snug, but not squeeze your finger. If your skin is ballooning over the top or bottom of your ring, then it’s too small.

Is Your Ring too Loose? Here’s How to Tell.

While you don’t want your ring to be too tight, you also don’t want it to fit too loose. Each year thousands of couples lose their engagement rings in the park, ocean, and to the monster that lives in your sink — the garbage disposal. Many of these rings are never found. The general rule of thumb is that your ring should be easier to slide on than off. So if you can take your ring off without any twisting or tugging, it’s most likely too loose.

Other Considerations

The Type of Ring you Plan to Wear

If you plan to purchase a wider ring like an eternity band or any style that’s 4mm or more across, or if you’re going to stack it with other rings in a wedding set, you’ll want to go a little looser and size up at least a ¼ size. Wide rings can quickly feel too snug, especially in summer. Make sure to take this into account when you measure ring size.

Your Finger Shape

Fingers come in all shapes and sizes. If you have larger knuckles but smaller fingers — you’re going to run into a challenge where the ring needs to be loose enough to slip over your finger, but tight enough that it doesn’t spin when on. If you size down too much, you won’t be able to get it on or off, but the spinning is enough to drive anyone mad. In this case, you have a few options:

Add a Sizing Bar

A sizing bar is a secondary piece that is attached to the ring to keep it from spinning, while still allowing it to be taken on and off.

Diagram of ring sizing options depicting sizing balls, speed bumps and a removable sizing bar.

Add Sizing Beads or “Speed Bumps”

Like a sizing bar, sizing beads, or a more streamlined alternative “speed bumps” are a good solution if your over-the-knuckle size is perfect, but the ring spins easily once it’s on. The beads and bumps will provide just a bit of traction to your ring so that it doesn’t spin.

Measure Twice. Cut Once.

We’ve all heard the saying, measure twice, cut once. Because finger sizes change over the course of the day, and from day to day, you’ll want to measure your ring size a few times to get a complete picture of what ring size to buy. If you have the time, it’s a simple way to reduce the risk of getting a ring that’s too big or too small.

Finally, and this is the most important, make sure to purchase from a jewelry company that offers free resizing. If you didn’t and need to get a ring resized, a jeweler shouldn’t charge more than $50 for a simple resizing. Any more and you’re paying too much. Ready to get your finger sized? Text us at (646) 859-0718, and we’ll put your free ring sizer in the mail today or click here to start your free try at home kit.