Cuban link chain guide: widths, lengths, weight and clasps

A Cuban link chain is built from short, uniform oval links that interlock and lie flat against each other, which gives it a dense, smooth surface. It is derived from the classic curb chain, and curb-chain making explains the flat look: the links are twisted so that, when you lift the chain by one end, it hangs in a single flat plane. A chain that spirals or kinks instead of hanging flat is worth questioning.

The Ganoksin jewellery-making community describes a hand-built curb chain like this: wire is coiled around an oval spindle, the coil is sawn into links, the links are opened with a sideways twist, and half of them are soldered closed. The chain is then twisted under tension, annealed halfway so the metal does not break, and filed to give the links flat facets. That project does not mention Cuban links, and factory chains are made by other methods, so treat it as a picture of how the curb shape works, not a description of how every Cuban chain is produced.

Names such as Miami Cuban are trade labels for versions of the style, not defined standards. Judge a chain by its measurements, weight, karat and photographs, not by the label. If you are comparing styles, the Cuban link chain entry covers the pattern itself, and the rope chain, Franco chain and Figaro chain entries explain how those patterns differ.

They are separate numbers, and a good listing gives all three. Width is how wide the chain looks from the front, measured in millimetres. Length is how long the chain is, in centimetres (or inches, where the seller uses them). Weight is how much metal you are buying, in grams. Width and length decide how the chain looks on you. Weight decides how it feels and how much metal you are buying.

They move together in ways that surprise first-time buyers. Doubling the length doubles the weight, because you are adding links. Widening the chain tends to add weight faster than the width number suggests, because a wider link is usually thicker front to back as well. That is why a 10 mm chain can weigh far more than a 6 mm chain of the same length, and why two chains with the same stated width can differ in weight if one is thicker or hollow.

For length, pick the number by measuring a necklace you already wear and laying it flat against a ruler. Common starting points are 45 cm (about 18 in), 50 cm (20 in), 55 cm (22 in) and 60 cm (24 in). Where a chain sits depends on your neck, your height and what you wear it over, so try one on if you can, and ask whether the stated length includes the clasp. A wide, heavy chain can look shorter than a thin chain of the same length because it fills more of the space.

Solid means the links are metal all the way through. Hollow means the links are thin-walled shells with an empty centre. A hollow chain can be made much wider for the same weight, so it is the way to get a bold look at a lower weight and a lower gold content.

The cost is strength. In a Ganoksin article on restoring a hollow link bracelet, the author notes that the gold in the link is extremely thin; the link near the clasp, which takes most of the wear, was broken, and several others were cracked or smashed. That is one repair case, not a rule, but it shows the weak point. Repair also takes skill: the author of a Ganoksin article on hollow rope chain says they struggled with rope chains for over a decade before finding a method for reweaving them.

Neither choice is wrong. If you will wear the chain every day, or it will carry a pendant, a solid chain is the better tool. If you want a wide chain for occasional wear and weight or cost is the limit, a hollow one can be the sensible choice, provided it is described honestly. The US Federal Trade Commission's Jewelry Guides, which are US guidance and not Canadian law, say a hollow product should not be marked or described as solid gold. Canada's Competition Bureau applies a general rule that claims must not be false or misleading in a material respect, so a listing that is vague about construction is a reason to ask.

Karat is the share of gold in the metal, counted in 24ths. The World Gold Council lists yellow 10K as 41.7 per cent gold, 14K as 58.3 per cent and 18K as 75 per cent, with the rest made up of other metals. Pure 24K gold is the purest and softest, which makes it more prone to scratches and dents, and 14K and 18K are alloyed with other metals for strength. Because the extra metal is what adds hardness, a lower karat number generally means a harder alloy, though the exact alloy matters too.

For a chain, that trade-off is practical. A chain is made of many links that rub against each other and against clothing, so softer metal is more likely to show scratches and wear. A 10K or 14K chain will generally resist that better than an 18K chain, and an 18K chain holds more gold per gram. 10K gold, 14K gold and 18K gold each have their own entry if you want the detail, and karat explains the scale.

Colour depends on the alloy. GIA describes yellow gold as gold alloyed with metals such as copper, silver and zinc, and rose gold as gold alloyed with copper and silver. White gold is usually plated with rhodium for a whiter look, and the rhodium wears off with time, so the chain may need replating, which is worth knowing before you choose a white gold chain you will wear against skin and clothing every day. The gold vs platinum guide compares the metals in more depth.

A quality mark such as 14K or 585 is a claim by the maker or dealer, not a government certificate. The Competition Bureau's precious metals marking page (last modified March 12, 2025) states that it is not mandatory to apply a quality mark to gold, silver, platinum or palladium. When a mark is applied, the Precious Metals Marking Act requires it to truly and correctly indicate the quality of the metal. The Bureau adds that a dealer must include a Canadian trademark with the mark unless the piece was hallmarked under UK law or accurately quality marked under another country's laws. The precious metal quality marks entry goes through the system in full.

The Regulations let gold be marked in karats or decimals, and set 9 karats as the lowest quality that can carry a gold quality mark. They also allow a small tolerance: the real gold content may fall short of the marked quality by no more than 7 parts per 1,000 where solder is used, or 3 parts per 1,000 where it is not (white gold of 18 karats or more has a wider allowance of 15 parts where solder is used). On a 14K chain with soldered links, gold content of about 57.6 per cent instead of 58.3 per cent can still pass. The point is not to look for a loophole. It is that a stamp tells you what the maker says, so the stamp, the weight and the seller's written description should agree with each other.

The clasp is the one part you handle every time you wear the chain, so it deserves the same attention as the links. Ganoksin describes a box clasp as a folded housing with a tongue that slides into it and a trigger you press to release it, and its instructions say to check that the clasp closes with an audible click. The same article says this kind of clasp is usually built into bracelets, necklaces and chains. A second Ganoksin article describes box catches as pairing security with simple use.

A safety catch adds a second lock. Ganoksin describes the familiar version as a wire loop that clips over a small ball on the other half of the catch, and notes that it does not suit the clean lines of a hidden catch. In other words, it adds security at the cost of a slightly bulkier look.

When you inspect a clasp, check four things. Does it close with a clear click and stay closed when you tug it? Is the metal thick enough for the weight of the chain? A box catch is only as secure as the strength, spring and wear resistance of its metal. Is it the same karat as the chain? And can you open and close it with one hand while wearing the chain? Lobster-claw and spring-ring styles also exist and work differently, so ask the seller how a given clasp locks and whether a safety catch is included. For a heavy chain, a clasp that is firm to close is a better sign than one that opens by itself.

Beyond the metal, a Cuban link chain can be polished smooth, finished with flat facets that catch light, or set with diamonds on the links. Sellers use terms such as diamond-cut for faceted finishes, so ask what the term means for the specific chain you are viewing.

An iced-out chain has small diamonds set into the links. GIA defines melee as diamonds and gemstones weighing less than one fifth of a carat, and says that melee differing in size by even 0.20 mm may be noticeable. Many chains use pavé setting, where stones sit close together held by small raised beads. Pavé settings may need occasional maintenance to keep the stones secure, and pavé bands can be harder to resize because adjusting them may disturb the small stones. A chain flexes as you move, so ask a jeweller how the stones are held and whether the chain can be shortened without disturbing them.

Two more points matter when diamonds are involved. First, ask for the total carat weight of the stones and whether the gram weight of the chain includes them. Second, ask whether the stones are natural or lab-grown. The FTC's guidance, which is US guidance, says lab-grown diamonds should be described as laboratory-grown, laboratory-created or similar wording, and that treatments that significantly affect value should be disclosed. The lab-grown vs natural diamonds guide and the lab-grown diamond, natural diamond and diamond treatments entries explain the differences. If you are weighing a similar piece for the wrist, the tennis bracelet guide covers line jewellery in the same way, and a tennis chain is the necklace version.

You do not need lab equipment to catch most problems. Work through this list, and write down the answers.

1. Get width, length, weight, karat and construction (solid or hollow) in writing, and check that they agree with the listing, the stamp and any invoice.
2. Find the quality mark and the maker's or dealer's mark, and ask where they are. A missing mark is not proof of a problem, because marks are not mandatory in Canada, but it means the karat claim rests on the seller's word alone.
3. Lift the chain by one end. A well-made curb chain hangs flat, and the links should move freely without catching.
4. Look for uneven links, gaps at soldered joints, rough spots and links that sit crooked, and ask about any you find.
5. Close the clasp several times, and check the click, the grip and any safety catch.
6. If you can, weigh the chain on a kitchen scale that reads in grams and compare the result with the stated weight.
7. For a diamond-set chain, ask for the stone count, the total carat weight, whether the stones are natural or lab-grown, and whether any are treated.
8. For a significant purchase, consider an independent jewellery appraisal or a second opinion from a bench jeweller.

A stamp does not confirm the karat by itself; only testing the metal does. A reputable seller will not mind you asking how the karat was verified, and will put the answer on the invoice.

A chain is made of many moving joints, so it collects skin oil and dust in the gaps between links. You can clean a diamond ring with a lint-free cloth or with warm water, mild soap and a soft toothbrush, and the same routine is a reasonable starting point for a plain gold chain. GIA advises against abrasive household cleaners and steam cleaners. It says ultrasonic cleaners are safe for untreated diamonds but can damage treated ones, and its diamond-care page says ultrasonic and steam cleaners can loosen gemstones in their settings. For an iced-out chain, a soft brush and a mild soap solution are safer, and the stones should be checked by a jeweller.

Store the chain on its own. GIA recommends keeping diamond jewellery in a padded box or soft pouch, one piece per container, so stones and metal do not scratch each other. For a chain, that also helps with tangles. Take the chain off before exercise, gardening or washing dishes, as GIA advises for rings, because a chain can catch on clothing or equipment. Check the clasp and the links every so often, and ask a jeweller how often to have a diamond-set chain inspected. GIA suggests having ring prongs checked every six months, and it is reasonable to ask a jeweller how often the beads holding stones on a chain should be checked. The jewellery care guide covers cleaning for diamonds and gold more generally.

Yes. Diamond Bros lists chains among the pieces its custom jewellery design service covers, and you can bring an idea or inspiration photos. The design studio is the place to start. A custom piece is worth considering when no ready-made chain has the combination you want. The usual order of decisions is the same as in this guide: choose the length first, then the width you like on you, then the karat and construction that fit your budget and how you will wear it, then the clasp, and finally any stones.

You can talk it through in person at the showrooms, and browse the men's collection, necklaces and bracelets for reference. Whichever jeweller you use, take your list of five facts with you: width, length, weight, karat and construction.