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Education›Engagement Ring Guidance›How to Find Your Ring Size at Home

Engagement Ring GuidanceFenora Guide8 min read

How to find your ring size at home.

Finding your ring size accurately at home is entirely possible with everyday materials. This guide gives you every reliable method — from borrowing an existing ring to the paper strip technique — with exact measurements and the international conversion chart you need.

What you need to know before measuring

Ring size measurement is straightforward but a few factors affect accuracy. Understanding them before measuring produces a more reliable result.

Factors that affect ring size

Time of day — fingers are at their largest in the evening due to daily fluid retention. Measure in the evening for the most accurate fit
Temperature — cold contracts fingers; heat expands them. Measure at a normal room temperature, not immediately after coming in from cold
Hand dominance — your dominant hand is typically slightly larger than your non-dominant hand. The ring will go on the left hand ring finger for most people — measure that specific finger
Exercise — fingers swell during and immediately after exercise. Wait at least 30 minutes after exercise before measuring
Time of month — hormonal changes can affect finger size slightly. Measuring at the same time in your cycle as normal conditions produces the most reliable result

“Measure in the evening, at normal indoor temperature, on the specific finger the ring will be worn on. Those three things produce the most accurate result.”
— Yash Chandpara, Founder

Method 1 — measure an existing ring

The most accurate home measurement method. Use a ring that already fits correctly on the ring finger of the hand the new ring will be worn on.

01
Select the right existing ring
Choose a ring that fits comfortably on the ring finger of the correct hand. It should slide over the knuckle without too much force and sit at the base without spinning significantly.
02
Place the ring on a flat surface
Put the ring on a piece of paper on a flat surface with the opening facing up.
03
Measure the internal diameter
Place a ruler across the inside of the ring, measuring from one inner wall to the opposite inner wall. The measurement should pass through the centre of the opening. Record the measurement in millimetres to one decimal place.
04
Convert to a ring size
Use the conversion chart in the Fenora Ring Size Guide to convert the internal diameter in millimetres to a ring size in your local system — AU/UK, US, EU or other.
05
Confirm the result
If possible, measure two or three existing rings that fit the same finger and confirm the measurements are consistent. Take the average if there is slight variation.

What to do with the measurement

Share the internal diameter in millimetres with Yash Chandpara during the consultation — this is the most precise way to communicate ring size
Alternatively, convert to AU/UK, US or EU size using the chart and confirm with Yash Chandpara

Method 2 — the paper strip method

Use this method when you do not have an existing ring that fits the correct finger, or when you want to measure your own finger directly.

01
Cut a strip of paper
Cut a thin strip of paper approximately 5–8mm wide and 15cm long. Narrower strips work better than wide ones — a very wide strip gives a less accurate circumference.
02
Wrap it around the base of the finger
Wrap the strip around the base of the ring finger — where the ring will actually sit, not at the knuckle. The base is typically slightly slimmer than the knuckle.
03
Mark the overlap point
Hold the strip in place and mark clearly where the end of the strip meets the wrapped portion. A pen mark directly on the strip at the point of overlap.
04
Measure the marked length
Remove the strip and lay it flat. Measure from the cut end to the mark in millimetres. This is the internal circumference of the finger.
05
Convert to diameter
Divide the circumference by pi (3.14159) to get the internal diameter: Diameter = Circumference / 3.14159
06
Convert to ring size
Use the Fenora conversion chart to find the corresponding ring size for this internal diameter.

Common errors with the paper strip method

Wrapping too tightly — the strip should sit comfortably on the finger, not be pulled tight
Measuring at the wrong location — measure at the base of the finger, not at the knuckle
Using a strip that is too wide — wider strips measure the finger less accurately

Size conversion chart — international standards

Use this chart to convert between measurement systems. All measurements are for the internal diameter of the ring.

Inside Diameter (mm)	AU / UK	US / Canada	EU / International	France / Russia
14.8	H	4	46.5	46
15.2	I	4.5	47.8	48
15.6	J	5	49.0	49
16.0	K	5.5	50.3	50
16.4	L	6	51.5	52
16.8	M	6.5	52.8	53
17.2	N	7	54.0	54
17.6	O	7.5	55.3	55
18.0	P	8	56.6	57
18.4	Q	8.5	57.8	58
18.8	R	9	59.1	59
19.2	S	9.5	60.3	60
19.6	T	10	61.6	62

Most common sizes

Most common size for women: AU/UK N / US 7 / EU 54 / 17.2mm internal diameter
Most common size for men: AU/UK T / US 10 / EU 62 / 19.6mm internal diameter

Measuring for a surprise — when you cannot ask

When buying as a surprise, finding the exact size requires some ingenuity. These are the most reliable approaches.

Finding her size without asking

Borrow an existing ring — the best method. Take a ring she wears on her left hand ring finger while she is not looking. Bring it to a jeweller or measure it at home and return it before she notices. Even a few minutes is enough to get an impression or measurement
Ask her best friend or family member — someone close to her often knows, or can find out naturally without revealing the specific reason
Look for rings she tries on in stores — if you are jewellery shopping together for other reasons, watch what size she reaches for or is handed by store staff
Check any existing rings she owns — a ring in her jewellery box that she wears on the correct finger can be measured while she is away

When you truly cannot find the size

Order in AU/UK N / US 7 — the most common size. This fits correctly or close enough for the vast majority of women
The complimentary Fenora resize within 60 days covers the correction. Propose, confirm the correct size afterward, use the free resize

Knuckle size vs finger base — when they are different

For some people, the knuckle is noticeably larger than the base of the finger. This creates a sizing challenge: size for the knuckle and the ring spins; size for the base and the ring will not go on easily.

Solutions for a knuckle larger than the finger base

Size for the knuckle — the ring passes over easily but may spin at the base. The most common solution is to add sizing beads (two small metal beads soldered to the inner base of the band). These allow the ring to pass over the knuckle but grip the base to prevent spinning. Discuss with Yash Chandpara during the consultation
Spring insert — a small spring mechanism inside the band that compresses to allow the ring over the knuckle and then expands to grip the base. More expensive than sizing beads but very effective for significant knuckle-to-base differences
Hinged shank — a section of the band that opens on a hinge to allow the ring over the knuckle, then closes to fit the base snugly. The most secure solution for very significant differences

“This is a genuinely common situation and there are good solutions. Tell Yash Chandpara the difference between your knuckle circumference and your base circumference and the right approach will be clear.”

Ring size at home — questions answered

Every question about at-home ring sizing.

Is the paper strip method accurate enough to order from?

Yes, with care. The main errors are wrapping too tightly and measuring at the wrong point. Done correctly, the paper strip method produces results accurate enough to order from. Measuring multiple times and averaging the results improves accuracy further.

My measurement falls between two sizes — which do I order?

Order the larger size. A ring that is slightly large is more comfortable and easier to resize than one that is slightly small. A ring that is too small cannot be worn safely and can be difficult to remove.

Can I use a piece of string instead of paper?

Yes, string works. The challenge with string is that it can stretch slightly when wrapped, giving a slightly smaller measurement than the actual circumference. Use a non-stretch string, or use paper if possible.

How do I know if my existing ring fits correctly?

A well-fitting ring: passes over the knuckle with moderate resistance, sits at the base of the finger without significant spinning, does not pinch or leave a mark after wearing and requires a deliberate action to remove. If any of these are not true, the ring does not fit correctly.

My fingers have changed size recently — when should I measure?

Measure when your fingers are at their normal stable size. If you have recently gained or lost weight, had a pregnancy, or experienced a health change that affected your fingers, wait until size has stabilised before measuring for a ring.

Melbourne client care · Made in Surat

Not sure of your size? Yash Chandpara will help.

Book a free online consultation. Yash Chandpara advises on ring size for every situation and the complimentary resize covers any correction needed after delivery.

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