Pearl Size Chart in mm: 3mm Baby Pearls to 15mm Edisons

Pearl Size Chart (mm)

Pearls are measured across their width in millimeters, and one millimeter is a bigger jump than it sounds: a 7mm pearl looks noticeably larger than a 6mm. The chart below puts every size DezLin sells, from 3mm baby pearls to 15mm Edisons, next to an everyday object and the cage pendant, Drop It Locket or sterling silver piece that fits it. Sizes on listings are nominal, so a pearl sold as 9mm may run a touch under or over.

The chart

Size About the size of Where it comes from at DezLin Looks like What fits it
3-5mm A grain of rice to a peppercorn Baby pearl oysters (2 to 100 pearls per shell), baby baroque sets Tiny, scattered, a "scoop" reveal Mini Drop It Lockets, small cages; too small for most cup-and-peg pieces
6mm A pencil eraser Akoya-style oysters (6-7mm), Monster oyster rounds (6-8mm) Dainty, classic stud size Standard cage pendants, Pop N Lock pieces, cup-and-peg rings and pendants
7mm A pea Akoya-style oysters, trays with a free cage, 7mm loose pearls, freshwater oysters (7-8mm) The classic pearl party pearl Standard cage pendants, standard 25mm and 30mm Drop It Lockets, cup-and-peg pieces
8mm A chickpea Freshwater oysters (7-8mm), budget Edison oysters (8-10mm) Noticeably fuller than 7mm Standard cages up to 9mm, 30mm lockets, cup-and-peg pieces
9mm A hazelnut Edison oysters (9-12mm), loose Edison pearls (9-11mm) The point where a pearl reads as "big" Larger cages, large basket cradles, most DezLin ring styles (sized for Edisons), 30mm lockets
10-12mm A blueberry Edison oysters and Edison Pearl Bombs (9-12mm) A statement pearl Large basket cradle (up to 14mm), Edison ring and pendant pieces, large lockets
13-15mm A grape or a marble Large Edison pearls by special order Rare, one-pearl jewelry Large basket cradle up to 14mm; above that, a custom piece

Shaped pearls are measured by their longest side: a north star pearl runs about 7x10mm, and rice pearls are oval, so the shape matters as much as the number. Those are counted on their own terms, not against round sizes.

How to measure a pearl

Lay the pearl on a ruler marked in millimeters and read its width at the widest point. A set of digital calipers gives a tenth of a millimeter if you want it. For a loose pearl you plan to set, measure twice, because the difference between a 6mm cage and a pearl that will not close in it is under a millimeter.

Which size fits which piece

  • Cage pendants open and snap shut around a 6-9mm pearl. Most Edison pearls will not fit a standard cage; a large basket cradle takes Edisons up to 14mm. Each cage listing states its maximum.
  • Drop It Lockets come in 25mm and 30mm. Standard lockets take 7mm pearls and up; mini lockets take baby pearls and small charms only; slimmer styles want smaller pearls.
  • Cup-and-peg sterling silver rings, pendants and earrings are made for 6-9mm half-drilled pearls, and almost every DezLin ring style is sized to fit an Edison.
  • Pop N Lock pendants and rings grip an undrilled 6-9mm pearl without glue.

How to set each one is on how to set a pearl.

What size pearl should you buy

For a party reveal, 6-7mm is the classic because it fits every cage and every budget, and twins look right together. For a necklace that reads as "real jewelry" from across the room, 8mm and up. For a single pearl that stops a conversation, an Edison at 9-12mm. Kids' pieces and charm lockets lean toward baby pearls at 3-5mm. Size also sets price: in the same grade, each millimeter up costs more, and large round Edisons cost the most. Grade is the other half of the picture; see the pearl grading chart.

Frequently asked questions

What is the standard size of a pearl?

7 to 8mm is the standard for a classic strand and the most common pearl party size. 6-7mm is dainty, 9mm and up is large, and anything over 12mm is a statement pearl.

How big is a 7mm pearl?

About the width of a pea or a standard pencil eraser. It fits every standard cage pendant and 25mm or 30mm Drop It Locket, and it is the pearl inside most DezLin Akoya-style oysters.

Are 10mm pearls too big?

Not for a pendant, a ring or a pair of statement earrings. A 10mm Edison pearl is bold on purpose. For a delicate everyday look, 6-8mm is the safer range.

What size pearl fits a cage pendant?

6 to 9mm for a standard cage. Edison pearls at 9mm and up usually need a large basket cradle, which takes pearls up to 14mm. Check the maximum on the cage listing before you buy a pearl for it.

Which locket fits an 8mm pearl?

A standard 25mm or 30mm Drop It Locket. The 30mm gives the pearl room to move and holds a second pearl or a few charms. Mini lockets are for baby pearls only.

How big are Edison pearls?

Usually 9 to 12mm at DezLin, with budget Edisons at 8-10mm and special orders up to about 15mm. Edisons are not perfectly round; gentle dimples and slightly oblong shapes are natural. See Edison pearls.

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Customer Reviews

Overall rating: 4.9 / 5 from 1270 reviews.

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Dezlin has been a wonderful company to work with! I love that if I have any questions or concerns I can call and actually speak with an owner!

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Great customers service and shipping still Haven’t gotten as post office has been close.

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No issue. Pearls were just as colorful ! I will measure tomorrow. Can't wait to see what the pink one size is!

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These pearls are beautiful! My first order was for 3 of the oysters that had 5 pearls each (1 Edison, 1 larger pearl, 2 rounds, and 1 shape). I also ordered 3 of the mini quad oysters. My mom, son, and I were blown away by the size and quality of the pearls! We placed a second order soon after, hoping it wasn't a fluke. Nope...Our second order was just as beautiful, if not more!! Shipping was super fast...It even arrived 1 day early! Yayyy! The picture I submitted doesn't come close to showing how beautiful the pearls truly are, but I tried. I have ordered oysters from many different companies and these are, by far, my favorite! I can't wait to place my next order...I'm just trying to pace myself so I don't become the crazy pearl lady! Haha

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Shipping was super fast, and everything came in perfect condition! We had the best time opening these at home and can’t wait to order more;) I found you on TikTok and love your videos! Thank you so much at DezLin!

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"I bought 2 colored twin oysters and 3 classic twin oyster. All were lovely, wish I had more color options but that’s the luck of the draw. Nonetheless they are all pretty and elegant." - Wendy M.

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I love, love, love my rice pearls! I even got a double in one oyster :-) So beautiful! Looking forward to my next order I just placed today. Thank you for your service and dedication to the pearl community!

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The green is so beautiful in this pearl. I had it floating on the chain for my daughter and she loves it and it is her favorite color.

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