How to Measure Your Ring Size at Home

Buying a ring you cannot try on is the single most common reason a piece ends up unworn. It is also the easiest problem to solve: you can measure your ring size at home in about two minutes, with things you already own. Here is how to do it accurately, and what to do if you land between two sizes.

Before you measure: two things that change your size

Ring size is not fixed. It shifts with temperature and time of day, which is why two measurements taken on different days can disagree.

• Measure at the end of the day. Fingers are largest in the evening and smallest in the morning.
• Measure at room temperature. Cold makes fingers shrink, heat makes them swell — a measurement taken in a cold room will come out too small.

Measure twice, on two different days, and use the larger number. A ring that is slightly loose stays comfortable; one that is slightly tight does not.

Method one: measure a ring you already wear

This is the most reliable method at home, because the ring has already proven it fits.

1. Take a ring that fits the finger you are buying for.
2. Place it on a ruler and measure the inside diameter — the distance across the inside of the band, from inner edge to inner edge. Do not measure the outside, or you will include the band thickness.
3. Measure in millimetres for accuracy, and check it against a ring size chart.

If you do not have a ring that fits, this method will not work — use the next one instead.

Method two: measure your finger with paper or string

This works when you have nothing to compare against, and needs only a strip of paper and a ruler.

1. Cut a strip of paper about 1 cm wide, or use a piece of non-stretchy string.
2. Wrap it around the base of the finger, snugly but not tight — it should slide over the knuckle without force.
3. Mark the exact point where the strip overlaps.
4. Lay it flat and measure the length in millimetres. This is your finger circumference.
5. Check the circumference against a ring size chart.

The two most common mistakes: using stretchy string (it stretches as you pull, giving a size that is too large), and measuring the wrong part of the finger. Measure the base of the finger, where the ring will actually sit — not the knuckle.

If you are between sizes

You almost always are, and the answer is simple: go up, not down.

• A slightly loose ring can be worn immediately and is comfortable in warm weather.
• A slightly tight ring is uncomfortable within an hour and gets worse in summer.
• Wider bands feel tighter than narrow ones at the same size, so size up for a wide band.

The one exception is a ring worn on a finger prone to shrinking in cold weather — but even then, a loose ring is easier to live with than a tight one.

The simpler solution: choose adjustable rings

If you are buying for someone else and cannot measure their finger without ruining the surprise, sizing is a genuine obstacle — and a ring that does not fit is a disappointment on the day it is opened.

Adjustable open rings remove the problem entirely. Instead of a fixed circumference, the band can be gently widened or narrowed to fit, so the gift works whatever the size.

That is why adjustable open rings are used in our boxes whenever rings are selected: it means you can choose a collection based on style and jewelry types, without needing to know a measurement you cannot discreetly take.

• Standard 16-piece box — a thoughtful first gift.
• Deluxe 28-piece box — more variety across jewelry types.
• Ultimate 48-piece box — the fullest collection.

How to measure someone else's ring size secretly

• Borrow a ring they already wear — measure the inside diameter and return it before it is missed.
• Ask someone who would know — a close friend or family member is less likely to spoil the surprise than the recipient.
• Skip sizing altogether — choose earrings, necklaces, or adjustable rings, none of which depend on a measurement.

FAQ

How do I measure my ring size at home?

Measure the inside diameter of a ring that already fits, or wrap a strip of non-stretchy paper around the base of your finger and measure the circumference in millimetres. Then check either number against a ring size chart.

Should I size up or down if I am between sizes?

Size up. A slightly loose ring is comfortable and wearable straight away, while a slightly tight ring becomes painful quickly, especially in warm weather.

Why do I get different ring sizes on different days?

Finger size changes with temperature and time of day — fingers are largest in the evening and in warm conditions. Measure at room temperature at the end of the day, and use the larger of two measurements.

What if I cannot measure the person's finger?

Either measure a ring they already own, ask someone close to them, or choose pieces that do not depend on size — earrings, necklaces, or adjustable open rings.

Choosing a gift? Read how to layer necklaces without tangling and our guide to choosing a jewelry mystery box as a gift, or browse the collection.