Pearl necklace lengths: choker to opera, and what suits each neckline

Two notes on the table. The ranges overlap because the names are conventions, not standards; a 16 inch strand is sold as a choker by some sellers and as a short princess by others. And the position on the body depends on the wearer: the same 18 inch strand sits lower on a smaller frame and higher on a larger one, which is the reason to measure rather than trust the name.

Crew neck and high necklines: a 16 inch choker sits above the fabric and reads cleanly, or a 20 inch matinee sits on top of it. Avoid 18 inches, which lands on the edge of the neckline and fights it.

Open collar, boat neck and V-neck: 18 inch princess. The strand follows the collarbone and fills the open space without crowding it. This is the length most people mean by "a pearl necklace".

Scoop and square necklines: 18 inches if the neckline is shallow; 20 inches if it is deep, so that the strand sits on skin rather than on fabric.

Strapless and off-the-shoulder: a 16 inch choker, close to the neck, where it has nothing to compete with. A long opera strand also works here, worn as a single drop.

Turtleneck and high-collared shirts: matinee or longer, worn over the garment. Shorter strands disappear.

Pearl size and length interact. Small pearls, 5–7 mm, suit shorter lengths; at a choker length they read as fine and modern, and at opera length they read as a thread. Mid-size pearls, 7–9 mm, are the all-rounders and look right at every length from choker to matinee, which is why 7–8 mm at 18 inches is the usual first strand. Large pearls, 9 mm and up, need room: at 16 inches they can look heavy against the neck, and they come into their own at 20 inches and beyond. If you are choosing a length for a size you already own, go one step longer for larger pearls and one step shorter for smaller ones. We show what each millimetre looks like in pearl sizes explained.

Length also changes the number of pearls, and therefore the price: an 18 inch strand of 7.5 mm pearls holds roughly 60 pearls, and a 24 inch strand of the same pearls roughly 80. Because we list sizes to the nearest 0.5 mm and match round and near-round strands within 0.9 mm, the count on our strands is predictable from the length.

Yourself: take a length of string or a flexible tape, hold it at the point on your chest or neck where you want the strand to sit, and bring the ends together behind your neck. Measure the string. That number is the necklace length, including the clasp. Do it standing, in a top with the neckline you plan to wear.

An existing necklace: unclasp it, lay it flat on a table in a straight line and measure end to end, clasp included. If a strand you already own sits exactly where you like, buy that length; the name on the label matters less than the number.

Checking a strand you receive: measure it the same way. A strand sold as 18 inches should measure 18 inches clasp to clasp; a seller who rounds up is doing on length what some do on pearl size.

Two strands layer best when they are at least four inches apart, so that neither sits on the other: a 16 inch choker over a 20 inch matinee, or an 18 inch princess over a 24 inch opera. Mixing pearl sizes helps, with the smaller pearls on the shorter strand. A single long opera or rope strand can also be doubled into two shorter loops, which is the traditional reason those lengths exist.

We carry four necklace lengths: 16 inch choker, 18 inch princess, 20 inch matinee and 24 inch opera. All are hand-knotted on PE fiber, which looks identical to silk but can last for decades, so they don't need the restringing every few years that silk does. For choosing the pearls themselves, size, luster and the rest, start with our buying guide.

Four lengths, hand-knotted on PE fiber, with the length stated to the inch: see the necklaces.