Necklace Length Guide: Where Each Inch Actually Sits

For most adults, an 18 inch (45.7 cm) necklace sits just below the collarbone and is the safest length if you are buying blind. A 16 inch (40.6 cm) chain sits at the base of the neck. A 20 to 24 inch (50.8 to 61 cm) chain falls toward the chest and suits larger pendants or a layered look. Your own neck, build and the pendant you hang from it can move each of those points by an inch or more, so measuring first matters more than any chart.

Standard necklace lengths, in inches and centimetres

Chains in Canada are still mostly sold in inches, so it helps to know the exact conversion. Canada's Weights and Measures Act, Schedule II defines the inch as "1/36 yard" and the yard as "9 144/10 000 metre". That works out to exactly 2.54 cm per inch, which is the figure used in the table below.

The length names come from the pearl trade. GIA's consumer pearl guide, Pearl: The GIA 7 Pearl Value Factors, puts it this way: "Traditional strands range from 14-16-inch chokers to 17-18-inch princess to longer matinee, opera, and rope lengths." GIA gives figures for choker and princess only. The ranges below for the longer names are common trade usage, not a published standard, and you will see retailers draw the lines an inch or two apart.

The "where it sits" column is a rough guide, not a promise. Two people wearing the same 18 inch chain can see it land in noticeably different places.

How your neck and build change where a chain sits

A necklace is a loop. The length printed on the tag is the full loop, and your neck uses some of it before anything hangs down. A larger neck takes up more of the chain, so the lowest point rides higher. This is the main reason size charts disagree with real life.

Neck circumference

If your neck measures 15 inches around, a 16 inch chain leaves only an inch of slack and will sit close like a collar. On a 13 inch neck the same chain drops lower and looks closer to princess length. As a working rule, I suggest adding at least 2 inches to your neck measurement to get the shortest length that won't feel tight. Anything shorter tends to dig in when you turn your head.

Chest, shoulders and posture

A broader chest or shoulders lifts a chain off the body and shortens how far it seems to fall. A slimmer frame lets the same chain drop further. Collared shirts and crew necks matter too. An 18 inch chain might disappear under a crew neck but sit perfectly in an open collar.

Men's chains

Men usually wear longer chains, mostly because necks tend to be larger. A 20 inch chain is a reasonable starting point, and 22 to 24 inches suits someone who wants it under a shirt. These are habits, not rules. Measure the neck anyway.

Pendants add drop: plan for it

A pendant doesn't sit at the end of the chain. It hangs below the lowest point by the height of its bail (the loop the chain passes through) plus its own height. A 15 mm pendant on an 18 inch chain will show up about 1.5 to 2 cm lower than the bare chain would. A heavier pendant also pulls the chain into a sharper V, which drops it a little more.

Some practical points from the bench:

• Small solitaire pendants (roughly 0.25 to 0.75 carat) look best on 16 to 18 inch chains, where they sit in the hollow of the throat or just below it. Hung on a 24 inch chain, a small stone tends to look lost.
• Larger or longer pendants usually need 20 inches or more so they clear the collarbone and hang flat instead of tipping forward.
• A very fine chain under a heavy pendant is a mismatch. The chain kinks, and the bail wears through it faster. Match the chain's gauge to the pendant's weight.
• A pendant that keeps flipping is usually sitting on the collarbone. Going 2 inches longer or shorter often fixes it.

If you're building around a stone, browse the pendant collection with the chain length already decided, not as an afterthought.

How to measure at home

You don't need a jeweller's tape. A piece of string and a ruler will do.

1. Wrap a soft tape or a length of string around the base of your neck, where a collar would sit. Note the measurement. That's your neck size.
2. Add 2 inches (about 5 cm). That's roughly the shortest chain that will sit comfortably without feeling tight.
3. Cut a piece of string to the length you're considering, for example 18 inches (45.7 cm). Hold the ends together behind your neck and look in a mirror. Wear whatever top you usually wear.
4. If you plan to add a pendant, tape something of a similar size to the string and check again. The pendant will sit lower than the bare string.
5. Try the next length up and down, 2 inches each way, before deciding. The difference is easier to see side by side.
6. If you already own a necklace you like, lay it flat, measure it end to end including the clasp, and use that number.

This takes about ten minutes, and it's more reliable than any chart, including the one above.

Layering, adjustable chains, and when to save your money

Layering

Layered necklaces look deliberate when each strand sits at its own level. Space them about 2 inches apart, for example 16, 18 and 20 inches. Closer than that and they tangle, and they look like a mistake rather than a choice. Put the heaviest piece on the longest chain so the others don't get dragged down.

Adjustable chains

Many chains are made with an extra jump ring or a short extender so they close at, say, 16 and 18 inches. If you're buying a gift and don't know the neck size, this is the sensible choice. It covers the two most common lengths with one piece. The trade-off is a small tail of chain at the back when you wear the shorter setting, which most people never notice.

Where the expensive option isn't worth it

In the same style and gauge, the price of a gold chain rises roughly in line with its length, because you're paying for more metal. A 24 inch chain you'll tuck under a shirt costs more than a 20 inch one that would sit in the same place for you. Buy the length you'll actually wear, not the longest the budget allows. And if you're unsure between two lengths, an adjustable chain usually costs less than buying two.

You can compare chain styles and lengths in our chain collection or browse finished pieces in the necklace collection.

What the stamp on the clasp tells you in Canada

Length isn't the only thing to check on the tag. The small stamp on the clasp or end ring tells you what the chain is made of, and Canadian rules govern it.

The Competition Bureau's Precious metals marking page states plainly: "It is not mandatory to apply a quality mark to items made of precious metals." If a mark is applied, though, "the law requires that it be truthful and applied in a manner prescribed by the legislation."

The Bureau's Guide to the Precious Metals Marking Act and Regulations sets out what the common marks mean:

• Gold can be marked in karats (10K, 14K, 18K) or by decimal equivalent, such as .417 for 10K, .583 for 14K and .750 for 18K.
• Sterling silver must contain "at least 925 parts pure silver in 1,000 parts by weight", which is why you'll see .925.
• Platinum marks apply to articles with "at least 95 percent platinum."
• Gold filled means gold of at least 10K bonded to a base metal, making up at least 1/20 of the article's weight. That's a very different product from solid gold.
• Vermeil refers to silver meeting the silver standard, plated with gold of at least 10K quality.

On a long chain this matters, because a gold-filled or vermeil 30 inch chain can look much like a solid gold one at a fraction of the price. Neither is dishonest if it's labelled correctly. Just read the stamp and the description before you compare prices.

What to do next

Measure your neck tonight with a piece of string, add 2 inches, and test one length on either side of that number in a mirror. Decide whether you'll wear a pendant, and if so, allow for the extra drop. If you're buying a gift and can't measure, choose an 18 inch or an adjustable 16 to 18 inch chain. It's the length least likely to need changing. When you have a number, compare finished pieces in our necklace collection, and see the blog for our other jewellery guides.

Sources

• Gemological Institute of America (GIA). Pearl: The GIA 7 Pearl Value Factors and What to Look For (consumer guide, PDF, undated; hosted in GIA's June 2014 uploads). 4cs.gia.edu
• Competition Bureau Canada. Precious metals marking. Date modified 2025-03-12. competition-bureau.canada.ca
• Competition Bureau Canada. Guide to the Precious Metals Marking Act and Regulations. Date modified 2025-03-17. competition-bureau.canada.ca
• Government of Canada, Justice Laws Website. Weights and Measures Act (R.S.C., 1985, c. W-6), Schedule II: Canadian Units of Measurement. laws-lois.justice.gc.ca