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How to Measure Ring, Bracelet & Bangle Size: Complete Guide + International Size Chart

Measure ring size at home with a paper strip or soft tape, bracelet length from wrist + ease, and bangle fit across the hand. Includes line-art diagrams and HK/US/UK/FR-CH size chart in mm.

Before buying rings, bracelets, or bangles, customers usually ask: what ring size, what bracelet length, and will the bangle go over the hand? This guide uses the three most common tools—paper strip, soft measuring tape, and ruler—plus diagrams and a conversion table so you can measure finger size, chain length, and fit at home and cut down on returns and resizing.

What you need before measuring

  • Soft tailor’s tape: quickest for wrist and finger circumference.
  • No tape? Use a narrow paper strip (about 0.5–1 cm wide) and a ruler or steel rule.
  • Room temperature; measure when fingers haven’t been in water a long time or just after heavy exercise. Evening is a good time (fingers are slightly larger, closer to daily wear).
  • Which hand: rings are often worn on the non-dominant hand (reverse if you prefer). Use the exact finger you will wear the ring on.

Rings: how to measure finger size (circumference)

Method A: soft tape around the finger (recommended)
Wrap the tape around the widest part of the finger (just above the knuckle toward the palm). Pull snug but not tight. Read the length in cm—that is finger circumference (multiply by 10 for mm).

Method B: paper strip + ruler (most common at home)

  1. Cut a long narrow strip and wrap it once around the same spot where the ring will sit.
  2. Mark where the strip overlaps with a pen line.
  3. Unfold the strip and measure from the end to the mark—that is circumference in mm.
  4. Repeat 2–3 times and average; avoid pulling too tight or too loose once.
Paper strip: three steps to measure finger circumference Side-view finger, strip wraps; mark overlap; ruler reads length. Fig.1 Paper strip — ring size in 3 steps Side view is illustrative · wrap → mark → measure (mm) ① Wrap once Widest below knuckle strip Snug · dashed = behind finger ② Mark overlap Draw on the strip Line = end of one loop Average several tries ③ Measure length Zero at strip start ruler length = inner circumference (cm×10=mm) e.g. 5.2 cm → 52 mm
Fig.1 is a simple line drawing (not to scale). The strip sits at the widest part below the knuckle; dashed line shows the strip behind the finger. Unfold and read millimetres (mm). Fingers swell slightly in warm weather—use the larger reading if in doubt.

Using a ring you already own (inner diameter)

If you have a round closed band that fits well, measure the inner diameter in mm and compare with the table. Keep the ruler through the centre and read the widest inner span.

Measure inner diameter of a ring Top view of ring; line shows inner diameter. Fig.2 Inner diameter (mm) Ø D Measure widest inner distance through centre
Fig.2: Inner diameter × π ≈ inner circumference (theory). Circumference from a strip usually feels most accurate; diameter helps when copying an old ring.

Ring size chart: Hong Kong / US–CA / UK / FR–CH

The table below lists common Hong Kong ring sizes with inner diameter, inner circumference, and US/Canada, UK, France/Switzerland equivalents so you can check against your mm measurement. Brands can differ by a half or full size; if you fall between two rows, choose the larger size or give the seller your mm circumference or diameter. If you print a paper sizer, use 100% scale (1:1) and verify a known length (e.g. 30 mm) with a ruler.

HK size Inner Ø (mm) Inner circumference (mm) US / CA UK FR / CH
5 13.8 43.3 3.0 2.75 3
6 14.1 44.3 4 3 4
7 14.5 45.5 5.5 3.5 5
8 14.8 46.5 6.5 3.75 6
9 15.2 47.7 8 4.25 7
10 15.5 48.7 9 4.75 8
11 15.9 49.9 10 5.25 9
12 16.2 50.9 11 5.5 10
13 16.6 52.1 12 6 11
14 16.9 53.1 13 6.5 12
15 17.3 54.3 14 7 13.5
16 17.7 55.6 15.5 7.5 14.5
17 18.0 56.5 16.5 7.75 15.5
18 18.3 57.5 17.5 8.25 16.5
19 18.7 58.7 19 8.75 17.5
20 19.0 59.7 20 9 18.5
21 19.4 60.9 21 9.5 19.5
22 19.7 61.9 22 10 20.5
23 20.1 63.1 23 10.25 22
24 20.4 64.1 24 10.75 23
25 20.8 65.3 25 11.25 24
26 21.1 66.3 26 11.5 25
27 21.5 67.5 27 12 26
28 21.8 68.5 28 12.5 27
29 22.2 69.7 30 12.75 28
30 22.5 70.7 31 13.25 —

Note: Published FR/CH equivalents often stop around 28. For HK 30, rely on inner Ø 22.5 mm / circumference 70.7 mm. If your strip measurement sits between rows, round up or send mm to the seller. Wide bands or large knuckles may need a half or full size up—ask the brand.

Bracelets & cords: wrist size and chain length

Comfort is wrist circumference + ease. Too little ease leaves a mark; too much lets the chain slip or catch on cuffs.

  • Wrist circumference: wrap a soft tape snugly around the bony part of the wrist; read mm.
  • Typical ease (guide only):
    • Close fit / snake chain: wrist + 10–15 mm.
    • Everyday comfort: wrist + 15–20 mm.
    • Drape / stacking: wrist + 20–30 mm.
  • Stiff links may feel smaller; cord + adjustable slider is more forgiving.
Measure wrist circumference Tape around wrist bones. Fig.3 Wrist: tape on skin around bones read overlap Wrist W (mm) → length ≈ W + ease
Fig.3: The wrist bone area is the most stable reference. Measuring across the widest part of the hand makes the bracelet too long.
Bracelet ease: tight vs comfortable vs loose Same wrist, three chain lengths. Fig.4 Same wrist — longer chain = looser fit tight little ease comfort often +15–20 mm loose drape / slides
Fig.4: There is no single “correct” ease—it depends on chain weight, stacking, and taste. When unsure, choose an adjustable design or ask the seller.

Bangles: closed vs open

A closed bangle must pass over the widest part of the hand (often from thumb base to little-finger side). Besides wrist size, check hand span against the bangle inner diameter.

Hand width for closed bangles Measure widest span across knuckles. Fig.5 Closed bangle: widest hand span (mm) span L (mm) Thumb side to little-finger side at widest; compare to seller’s inner Ø.
Fig.5: Hand shapes vary: the same wrist can need different bangle IDs. Always read the listing’s inner diameter / opening specs.
  • Hinged or open cuffs: check opening travel and metal stiffness; bend evenly to avoid work-hardening or cracking.
  • Oval (e.g. “Saddle”) bangles: follow the seller’s long / short axis instructions—they differ from round bangles.

Necklace lengths (quick reference)

For necklaces, a soft tape around the neck helps: many women’s 40–45 cm sit near the collarbone, 50–55 cm lower; men’s lengths depend more on build. Use the product photos on the listing as the main guide for chain length, neckline, and layering.

Tips to reduce sizing mistakes

  • Average several measurements; thick paper strips slightly inflate the reading.
  • Wide or multi-stone rings often feel tighter—many people go up half to one size (brand dependent).
  • If the knuckle is much wider than the finger shaft, size for getting over the knuckle without trapping the ring below it.
  • When buying online, pick sellers who offer sizing help or exchange, and send mm circumference plus your usual US/UK/EU size if known.

FAQ

Winter vs summer finger size?
Use the season you wear the ring most, or split the difference; when unsure, use the larger measurement and confirm with the seller.

Only an old ring—no tools?
You can use the diameter method above; odd shapes or hollow shanks add error—strip measurement is still best when possible.

“Wrist size” vs “finished bracelet length”?
Sellers define these differently. Give wrist W (mm) plus desired fit (snug / comfort / loose) and let them convert to finished length.

Share your mm numbers and how you like things to fit—that’s the fastest way to get the right ring, bracelet, or bangle when buying wholesale or retail online.