The most common question that reaches our inbox is some version of this: is 18 inches going to be too long on me?
It's a fair question and the answer is genuinely unclear from a product page. Nearly every brand lists lengths in inches and then photographs the necklace on one model with one neck, which tells you nothing about where it will sit on you. So here is the version I wish someone had handed me: the numbers, where they land, and how to know yours before you order.
The short answer
On most adults, a 16" necklace sits at the base of the throat, right where the collarbones meet. An 18" sits an inch or two lower, just below the collarbone. A 20" lands closer to the top of the sternum. Anything past 22" starts to sit at or below the bust line.
If you want one number and you want to stop reading: 18" is the safest single choice. That's also why most of our chains adjust between 16" and 18". You get both and you decide after it's on.
Where each length actually falls
| Length | Traditional name | Where it sits | Works well with |
|---|---|---|---|
| 14" | Collar | Snug around the mid-neck | Bare shoulders, off-shoulder tops |
| 16" | Choker | Base of the throat, at the collarbone notch | Crew necks, open collars, the top strand when layering |
| 18" | Princess | Just below the collarbone | Almost everything. Pendants sit at their best point here |
| 20" | Matinee | Upper chest, a few inches below the collarbone | V-necks, blazers, the lower strand when layering |
| 22"–24" | Matinee (long) | At or just below the bust | Turtlenecks, knits, longer pendants |
| 28"–36" | Opera | Below the bust, near the waist | Statement layering, or worn doubled |
These are averages, and the reason they shift from person to person is not height. It's neck circumference. The chain has to travel all the way around your neck before any of it is left over to hang, so a larger neck eats more of the length.
Measure yourself in 30 seconds
Two ways. Both are faster than scrolling reviews hoping someone your size posted a photo.
The string method
Take a piece of string or a phone charging cable. Hold it around your neck and let it fall where you'd want the necklace to sit. Pinch it there, lay it flat, measure with a ruler. That number is your length. Done.
The math method
Measure your neck circumference where a shirt collar would sit. Most adults land between 12" and 15". Then:
- Neck + 2" sits snug at the base of the throat
- Neck + 4" sits at the collarbone
- Neck + 6" sits on the upper chest
- Neck + 8" sits mid-chest
So a 13" neck plus five inches puts an 18" chain right at the collarbone. A 15" neck wearing that identical 18" chain gets a noticeably higher, closer fit. Same product, different outcome, and neither one is a defect. This is the single thing most size complaints come down to.
One more variable that people forget: a pendant adds its own drop. A 20mm pendant on an 18" chain reads visually like a 19" necklace. If you're between sizes and the piece has a pendant, size down.
How your neckline changes the answer
What you're wearing matters more than your height does.
Crew necks and t-shirts. A 16" sits above the fabric edge, against skin. An 18" usually lands right on the neckline itself, which reads either intentional or fussy depending on the piece. Fine chains handle this better than chunky ones.
V-necks. The rule that actually works: the necklace should end above the point of the V, not inside it and not below it. For a standard V-neck tee that's usually 16" to 18".
Button-downs with the collar open. 16" is the natural fit. It sits inside the open collar and frames it. Longer chains disappear under the placket and reappear lower down, which looks accidental.
Turtlenecks and heavy knits. Go 20" or longer. Short chains get swallowed by thick fabric and lose their shape entirely.
Strapless or off-shoulder. Shorter. 14" to 16". There's no neckline competing with the necklace, so it becomes the focal point, and you want it high.
Layering two necklaces without a mess
Most layering advice says "mix your lengths," which is true and completely useless. Here's the part that isn't.
Leave at least 2 inches between chains. Any less and they cross constantly. For two plain chains, 2" is enough. A 16" and an 18" layer cleanly all day.
If either piece has a pendant, widen that to 4 inches. A pendant needs room to sit in its own space. A 16" chain with a 20" pendant necklace works. A 16" and an 18" with pendants on both will tangle every time you turn your head.
Vary the weight, not just the length. Two chains of identical thickness at different lengths read as a mistake rather than a choice. One fine chain plus one with visible texture, like a beaded or faceted strand, gives the stack a reason to exist.
Put the heavier piece on the bottom. Weight pulls down and out. If the heavy piece sits on top it drags the lighter one out of position all day.
A practical note on adjustable chains. If you're layering two adjustable 16"–18" pieces, set one to 16" and the other to 18". That's the entire trick, and it's why adjustable chains are worth more than they look on a spec sheet. If you want more on stacking specifically, we went deeper on it in the layering guide.
Why length matters more with silver than you'd think
Sterling silver is 92.5% pure silver, and pure silver is soft. That softness is what gives it the depth of color you never get from steel. It's also why a chain that's slightly too long behaves differently over months of wear.
A necklace sitting at the wrong length gets tugged, caught on collars, and worked back and forth in the same spot. Links wear at that spot first. A chain sitting where it's meant to sit mostly just hangs there. Same piece, several more years of life.
If you want the full breakdown of what 925 means and how it holds up, that's covered in our sterling silver guide. Clasps are the other thing worth checking once or twice a year, which is in the care guide.
Common questions
Is 18 inches too long for a short neck?
Usually not, but it will sit lower on your chest than it does on the model. If you have a shorter neck and you want the necklace to read as a neck piece rather than a chest piece, 16" is the better call.
What is the most popular necklace length?
18" is the default in the US and the most commonly sold length. That's a fact about manufacturing convention, not about what suits you.
Can I shorten a necklace myself?
You can, but on a fine sterling chain we'd advise against DIY. A jeweler can remove links or reposition the clasp cleanly for very little. An adjustable chain avoids the question entirely.
Does pendant size change the length I need?
Yes. Add roughly the height of the pendant to the effective drop. A large pendant on a long chain sits noticeably lower than the chain length alone suggests.
How many necklaces can I layer at once?
Two is easy. Three works if the lengths are spaced at least 2" apart and only one piece carries a pendant. Past three it stops being layering and becomes an outfit.
Every Hermin chain is full-body 925 sterling silver, clasps included, and most of our necklaces adjust between 16" and 18" so you don't have to commit before you've worn it.
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