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Find the right size,
before you ask

Three ways — pick the one that fits your situation.

Recommended
◎
On-Screen
Ring Sizer
Have a ring that fits? Place it on your screen. Calibrate once, match instantly. No printing, no measuring tools needed.
Open sizer →
◌
Measure
at Home
A strip of paper and a ruler. Works directly on a finger — useful if you're measuring without them knowing.
See how →
⬡
Print &
Match
Download our printable sizer. Place a ring over the circles to find the size. Includes a calibration check.
Download PDF →
Reference
US ring size chart

Inside diameter and finger circumference for every size. Highlighted rows are the most common range.

US Size Diameter (mm) Circumference (mm) Notes
3 14.1 44.2 Very small / petite fingers
3.5 14.5 45.5
4 14.9 46.8 Slender fingers
4.5 15.3 48.0
5 15.7 49.3
5.5 16.1 50.6
6 16.5 51.9 Most common US average
6.5 16.9 53.1 Most common
7 17.3 54.4 Most common
7.5 17.7 55.7
8 18.2 57.2 Larger fingers
8.5 18.6 58.3
9 19.0 59.7 Larger fingers
9.5 19.4 61.0
10 19.8 62.2 Larger fingers
10.5 20.2 63.5
11 20.6 64.8
11.5 21.0 66.0
12 21.4 67.3 Very large fingers

If guessing a partner's size, 6.5 is the single safest estimate. When between sizes, always choose the larger.

Good to know
🌙
Measure in the evening
Fingers swell slightly through the day — up to half a size bigger by evening than in the morning.
↑
When in doubt, size up
A slightly loose ring is far more comfortable than one that's too tight to remove.
◻
Wide bands fit tighter
Bands wider than 5mm sit higher and feel snugger. Consider half a size up for wide shanks.
✋
Measure the right hand
The dominant hand is often slightly larger. Measure the specific finger the ring will be worn on.
❄️
Temperature matters
Cold fingers shrink. Measure at comfortable room temperature — not after cold water or exercise.
⬡
Check the knuckle
If the knuckle is noticeably wider than the base, size for the knuckle — the ring must clear it.
Still not sure? We'll help you figure it out before you order. No bots.
Email us
←
Return to
Settings
Recommended method
On-Screen Ring Sizer
Two quick steps. Calibrate your screen using a credit card, then place an existing ring over the circle and adjust until it matches.
Step 1 · Calibrate
Step 2 · Match ring
Place a credit or debit card on the outline below. Use + and − until the red lines align exactly with the top and bottom of the card. Then tap Apply.
Place card here
85.6 × 54 mm
— px
Adjust until the red lines align with the card edges
Place a ring flat on the circle below. Use + and − to adjust until the ring's inner edge aligns with the circle.
—
US Size — Adjust to match the ring
Measure at Home
A strip of paper and a ruler. Accurate to within half a size. Good for measuring directly on a finger.
The strip method
1
Cut a thin strip of paper
About 6 inches long, ¼ inch wide. A receipt or index card works well.
2
Wrap around the base of the finger
Snug — not tight. Pass over the knuckle if it's wider than the base.
⚠ If the knuckle is noticeably larger, measure for the knuckle size.
3
Mark where the ends meet
Use a pen to mark exactly where the strip overlaps.
4
Measure the strip in mm
From the end to your mark. This is the finger circumference.
5
Find your size
Enter your measurement below.
Strip measurement → size
Circumference (mm)
US Size — Enter your measurement
Have an existing ring? Use its diameter
Inside diameter
US Size — Enter a diameter to see your size
Use a ruler or calipers. If between sizes, the larger is almost always more comfortable.
No ruler? Try the coin method
Place a coin inside an existing ring. Select the coin that fits most snugly without falling through.
Print & Match
A single-page PDF with true-to-scale circles for every US size. Place an existing ring over the circles to find the size.
How to use
1
Download and print at 100% scale
Do not scale to fit. A credit card calibration box is included — it must match the physical card exactly.
2
Place a credit card on the calibration box
The red dashed lines must align with the top and bottom of the card. If they don't, reprint at 100% scale.
3
Place a ring over the circles
Find the circle where the inside edge of the ring matches the circle exactly.
4
If between two circles, order the larger
Wide bands (5mm+) may need a half size up.
⬇ Download PDF Ring Sizer
Single page · Black and white · Print at 100% scale