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At-home methods
Four Ways to Measure
Use whatever you have at hand. Whichever you pick, enter the millimeters in the finder above.
M1Paper or string
M2A ring you own
M3Printable sizer
M4Plastic sizer
Paper or string
No tools needed.
Open the printable sizer
Match a ring on your screen
Calibrate firstScreens vary, so first size this rectangle to a standard bank card (85.6 × 54 mm). Then lay a ring you own over the circles and read the size where the inside edge matches. On-screen sizing is a guide — millimeters remain the source of truth.
1 · Calibrate to a bank card
Your bank card
Drag until the rectangle is exactly the size of a real card held to the screen.
2 · Lay your ring over a circle
That looks like US — enter it in the finder to see every system.
Reference chart
Every System, Side by Side
US diameters are exact; circumference is diameter × π; UK and EU are the standard published equivalents.
US / CA
Inside Ø
Circumference
UK / AU
EU
4
14.9 mm
46.8 mm
H½
47
4.5
15.3 mm
48.0 mm
I½
48
5
15.7 mm
49.3 mm
J½
49
5.5
16.1 mm
50.6 mm
K½
51
6
16.5 mm
51.9 mm
L½
52
6.5
16.9 mm
53.1 mm
M½
53
7
17.3 mm
54.4 mm
N½
54
7.5
17.7 mm
55.7 mm
O½
56
8
18.1 mm
57.0 mm
P½
57
8.5
18.5 mm
58.3 mm
Q½
58
9
18.9 mm
59.5 mm
R½
60
9.5
19.4 mm
60.8 mm
S½
61
10
19.8 mm
62.1 mm
T½
62
10.5
20.2 mm
63.4 mm
U½
63
11
20.6 mm
64.6 mm
V½
65
11.5
21.0 mm
65.9 mm
W½
66
12
21.4 mm
67.2 mm
X½
67
12.5
21.8 mm
68.5 mm
Y½
69
13
22.2 mm
69.7 mm
Z½
70
Quarter sizes available on request for made-to-order pieces.
The fit rules
Get It Right the First Time
Measure at day's end
Fingers are warmest and largest then. Cold fingers can read up to a half-size smaller.
Mind your knuckle
If your knuckle is wider than the base of your finger, measure both and choose a size in between — so the ring slides over but doesn't spin.
Wider bands fit tighter
For a band 6 mm or wider, go up about a half size. Our comfort-fit profile already wears a touch easier, but still size up for wide styles.
Between sizes? Go larger
It's far easier to size a ring down than up.
Measure 3–4 times
At different times of day, then take the most common reading.
Stacking rings?
Measure with all the bands stacked together, not one at a time.
Buying a surprise?
Measure Without Giving It Away
A few discreet ways to find their size — and a safe starting point if you truly can't.
Borrow a ring
Take one they wear on the intended finger. Trace the inside circle on paper, or press it into a bar of soap for an impression — then measure the diameter, or send it to us.
Simply ask
A close friend or family member often knows their size, or can find out without spoiling the surprise.
Compare hands
Match to someone with similar hands whose size you already know.
Gift a sizer
Order a free sizer and make finding the size part of the moment, together.
Average sizes — a starting point
Women · US 6–7
Most fall between 5 and 8
Men · US 10
Most fall between 8 and 12
If you can't measure, start from the average and size up if unsure — or request a free sizer to gift the sizing moment together.
Before you resize
Some Rings Can't Be Resized
Because we craft and ship from Surat, we can't resize after delivery — so resizing means a remake or a trusted local jeweler, and some designs can't be resized at all. Getting the size right before you order matters most.
Usually resizable
Solitaires and plain or partially-set comfort-fit bands. Metal is added or removed at the base, and the change is invisible within a size or so.
Hard or impossible to resize
Full eternity bands, full pavé, channel-set, and tension-set rings. The stones or structure run continuously around the band, leaving no metal to work.
Size these exactly the first time.
Bracelet & bangle
Wrist & Hand
Bracelet calculator
Wrap a tape or paper strip around your wrist, just below the wrist bone. Enter it below.
inches
cm
Comfortable leaves room for two fingers between band and wrist. Delicate chains suit a snug fit; cuffs and chunkier styles suit comfort. Averages: women ~7 in, men ~7.5–9 in.
Enter your wrist measurement to see snug and comfortable lengths.
Bangle — over the hand
A closed bangle has no clasp, so it must clear your hand.
1Bring your thumb to your little finger, as if putting one on.
2Measure around the widest part of your hand, over the knuckles.
3Match the closest size. A good fit is slightly tricky over the knuckles but sits loose on the wrist without falling off.
Between sizes, go larger so it slides over comfortably. Hinged or clasp bangles size to the wrist, not the hand.
Necklace & chain
Where It Should Sit
16"
18"
20"
22"
24"
18"
45.7 cm · Princess
Rests at the collarbone. Most popular for women, and suits most necklines.
For a pendant, add a little length so it sits where you want. Layering? Leave about 2 in between chains.
Still unsure?
We'll Send a Free Sizer
For made-to-order pieces, it's worth getting exactly right. Request a reusable belt-style sizer and measure with professional-grade accuracy — or message our team and we'll walk you through it.
Design something custom
Use your size to start a one-of-a-kind piece from our Surat atelier.
Open Truly Custom →Caring for your jewelry
How resizing works, and a complete guide to keeping every piece brilliant.
Read the care guide →Explore the gem library
Every gem's color, hardness, meaning, and care — the reference behind every piece.
Open the encyclopedia →