Education
The Same Word, a Different Meaning: Jewellery Terms Across Countries
Buying across borders means two people using the same vocabulary to mean different things.
Written by the Mapple Gems workshop, Surat · Updated 17 September 2026
Short answer
The five that cause real problems: ring size (five incompatible systems, one of which differs from another by exactly 40), carat vs karat (weight vs gold purity, and some markets spell both the same way), hallmark (an official assay mark in some countries, any stamp in casual use elsewhere), “gold” (solid in some markets, plated in others unless stated), and return rights (which vary completely and exempt custom goods almost everywhere). Send millimetres and numbers and the ambiguity disappears.
Buying jewellery from another country is mostly straightforward. What goes wrong is rarely intent — it is two people using familiar words that carry different meanings in their respective markets, and neither realising it.
1. Ring size — the worst offender
| System | Used in | Form |
|---|---|---|
| Numeric | US, Canada | 4, 5, 6, with halves and quarters |
| Alphabetic | UK, Ireland, Australia, NZ | J, K, L, with halves |
| Circumference in mm | Germany, Netherlands, much of the EU | 52, 54, 56 |
| French convention | France | 12, 14, 16 — differs by 40 |
| Japanese scale | Japan | 1 to 27 — matches nothing else |
Note the French row. A French size 12 and a German size 52 are the same finger, expressed 40 apart — and both are bare numbers, so nothing about them signals which convention is in play.
Double conversion is what actually causes misfits, and it is entirely avoidable. You look up your size in another market’s system and send that number. The workshop converts it back to work in. Each conversion rounds, and rounding twice compounds — and if either party guesses the wrong convention, the error is not a rounding error but a whole size or more. We have seen rings arrive a full size out with nobody at fault and both parties’ arithmetic correct. The fix costs nothing: send the inner diameter or circumference of an existing ring in millimetres. A millimetre is a millimetre in every country and every system, so it cannot be misread, and nobody has to convert anything at either end.
2. Carat and karat
Two different measurements that sound identical.
Carat is a unit of gemstone weight — one fifth of a gram. Karat is a measure of gold purity out of 24. In British and Commonwealth usage both are frequently spelled carat, which produces sentences where “18 carat” and “1 carat” mean entirely unrelated things.
The unambiguous alternative is the fineness number: 375, 585, 750, 925. Those mean parts per thousand and are read the same way everywhere. Ask for the fineness rather than the karat and this disappears.
3. “Hallmark”
In the UK, France, the Netherlands, Ireland and Switzerland, a hallmark is a specific thing: an official mark applied by a state assay office after testing, usually several marks together including a sponsor’s mark and an assay office mark.
In markets without mandatory hallmarking — Germany, Canada, Australia, the United States and many others — the word is used loosely to mean any stamp inside a ring. So “it’s hallmarked” can mean an independently verified assay mark or simply a maker’s own fineness stamp, and the two are not equivalent.
Ask which marks are present, specifically. And note that an unhallmarked ring is not suspicious — most of the world does not require it.
4. “Gold”
Descriptive rules differ, and the word alone is not a specification anywhere.
- A number with no letters after it means solid — 10K, 14K, 18K, 375, 585, 750.
- Letters after it mean a layer: GP (gold plated), GF (gold filled), HGE, RGP, GEP.
- “Vermeil” means gold over sterling silver, and the minimum thickness that qualifies differs by market.
- A 925 stamp on a gold-coloured ring means plated silver, wherever you are.
And remember 14K and 18K yellow are visibly different shades side by side — so when matching a band across borders, “yellow gold” is not enough. 585 or 750 is.
5. Returns and “guarantee”
The most consequential difference, because it is legal rather than linguistic.
The EU and UK give a statutory 14-day cancellation right on distance purchases — which carries an exemption for goods made to the consumer’s specification, covering most made-to-order rings. Australia and New Zealand have consumer guarantees that cannot be contracted out of but no general change-of-mind right. Switzerland, Singapore, Japan and the UAE have no statutory cooling-off period for these purchases at all. Canada’s rules are provincial rather than federal.
Separately, “guarantee” and “warranty” are used interchangeably in some markets and distinguished in others — and a seller’s voluntary warranty is a different thing from your statutory rights, which sit underneath it and cannot be removed.
The general rule
Numbers travel; words do not. Millimetres, grams, fineness figures and stone dimensions mean the same thing in every market and every language. Size letters, karat spellings, “hallmarked”, “gold” and “guaranteed” do not.
So when buying across borders, ask for the specification in figures — and give yours the same way.
Keep reading
Frequently asked questions
Why do ring sizes differ between countries?
Five incompatible systems are in use: US numbers, UK and Commonwealth letters, European millimetre circumference, a French convention that differs from the European one by exactly 40, and Japan’s own 1–27 scale. Send the inner diameter or circumference in millimetres instead — it means the same thing everywhere.
What is the difference between carat and karat?
Carat is gemstone weight — one fifth of a gram. Karat is gold purity out of 24. British and Commonwealth usage often spells both “carat”, so “18 carat” and “1 carat” can appear in one sentence meaning unrelated things. Ask for the fineness number instead: 375, 585, 750 or 925.
Does “hallmarked” mean the same thing everywhere?
No. In the UK, France, the Netherlands, Ireland and Switzerland it means an official mark applied by a state assay office after testing. Elsewhere the word is used loosely for any stamp inside a ring, including a maker’s own fineness mark. Ask which marks are present specifically.
Do return rights work the same in every country?
No. The EU and UK give a 14-day cancellation right on distance sales with an exemption for goods made to the consumer’s specification; Australia and New Zealand have consumer guarantees that cannot be contracted out of but no change-of-mind right; Switzerland, Singapore, Japan and the UAE have no statutory cooling-off period; and Canada’s rules are provincial.
Numbers travel. Words do not.
Send us millimetres, grams and fineness figures — and we will send the specification back the same way.
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