A complete Indian to Australian ring size chart for 2026 — convert Indian numeric sizes into Australian/UK letters, compare inner circumference and diameter, calculate the nearest match and measure accurately before ordering jewellery between India and Australia.
Print at 100% or “actual size”. Confirm the 50 mm calibration line before using the circles. Place a correctly fitting ring over a circle and align the ring’s inside edge—not the outer metal edge.
Indian jewellery charts commonly list sizes as numbers such as 8, 10, 12, 14, 16 and 18. Each number is associated with a specific inside circumference and diameter. The exact values can vary slightly between retailers, so the seller’s published measurements matter more than the label alone.
Australian jewellers generally use the same letter-style scale used in the United Kingdom, with sizes such as K, L, M, N, O and P plus half sizes. Letters are not direct metric values; each one corresponds to a measured inside circumference.
A 16.50 mm diameter gives about 51.84 mm circumference.
A 54.40 mm circumference gives about 17.32 mm diameter.
5.44 cm becomes 54.40 mm before the AU letter is selected.
Read the Indian row’s circumference, then match the nearest AU value.
Do not automatically round down, especially for broad bands.
Circumference plus diameter reduces cross-border sizing confusion.
The calculator uses published Indian measurements and a practical Australian/UK circumference reference. Individual jewellery brands may round to a neighbouring letter or half size.
| 🇮🇳 Indian Size | 🇦🇺 AU / UK Approx. | ⭕ Circumference (mm) | 📏 Inner Diameter (mm) | 🇪🇺 EU Approx. | 🇺🇸 US Approx. | Typical Range |
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Ring fingers can differ between left and right hands. Measure the finger on which the ring will actually be worn, not another finger that appears similar.
Wrap a paper strip around the finger base. Keep it comfortably snug without compressing the skin. Avoid elastic thread and thick cord because they distort the reading.
The ring must pass the knuckle and remain secure at the base. When the knuckle is noticeably wider, compare both points and seek a professional fitting for an expensive ring.
Mark the overlap, flatten the strip and measure the length to the nearest tenth of a millimetre where possible. Enter the circumference in the calculator.
Heat, cold, exercise and temporary fluid retention affect finger size. Take several readings when your hands feel normal and use the most consistent result.
Wide wedding rings contact more skin and often feel tighter. Ask the Australian seller whether to move to the next half size for the specific design.
Use a ring worn on the same finger and hand. A comfortable ring from another finger can produce the wrong AU conversion.
Lay the ring flat and measure straight across the widest inner point through the centre. Exclude the metal walls. A digital calliper is preferable for half-size decisions.
Measure again after rotating the ring 90 degrees. Different readings may indicate an oval or damaged ring that should be professionally measured.
Use the inner-diameter option in the converter. Record the Indian result, estimated AU letter and the exact millimetre value for the seller.
One seller may round a measurement to a whole letter while another offers half sizes.
Physical sizing tools and mandrels may not be calibrated identically.
A broad ring can require more room than a thin ring with the same nominal size.
Rounded interiors may feel different from flat interiors.
Eternity and tension settings require greater accuracy before purchase.
Temperature and swelling can shift the practical fit.
Published Indian numeric sizes with circumference and diameter measurements.
Australian/UK letter chart and circumference references used for practical matching.
Australian guidance for measuring a finger or an existing ring and seeking professional sizing.
International reference for ring-size definition and measurement designation.