How a Cartier Love Bracelet Should Fit: The Complete Sizing Guide
The Cartier Love Bracelet
Sizing & Authentication Guide
A working reference for anyone buying, selling, or verifying the most recognizable bracelet in modern fine jewelry. Measurements, markers, and the details Cartier gets right that counterfeits get wrong.
Sizing Is The First Authentication
The Cartier Love Bracelet was designed in 1969 by Aldo Cipullo, and it has worn its design philosophy on its sleeve ever since: a fixed, unresizable oval, meant to be fastened and stay fastened. That permanence is part of its romance. It also means size is not a detail you can correct after the fact.
Cartier currently produces the rigid Love Bracelet in three widths—Small, Medium, and Classic—each offered in a different size range. Sizes run in whole-centimeter increments and correspond to the inner circumference of the bracelet. A size 17 fits a 15.5 cm wrist with room for natural movement. A size 19 suits a 17.5 cm wrist. Size 15 is produced across all three widths but is uncommon in the secondary market and typically handled as a special order. Size 22 exists only on the Medium model; the Classic is not produced in size 22, and the Small model tops out at size 19. The bracelet should rest against the wristbone, never compress it, and slide an inch or so toward the elbow when the arm is raised.
Before measuring, take a flexible soft tape and wrap it around the smallest point of your wrist, immediately below the wristbone. Note the centimeter reading. Add 1.5 cm to 2 cm for daily-wear comfort. That sum is the size you should order. When in doubt between two sizes, size down. A Love Bracelet that is loose will shift, scratch, and read as ill-fitting; a Love Bracelet that is snug reads as intentional.
Cartier Love Bracelet Size Chart
Each row shows the size, interior circumference, and which of the three widths Cartier produces it in. A checkmark means Cartier currently offers that size in that width; a dash means it does not. Approximate wrist ranges: size 17 fits a 15.0–15.5 cm wrist, size 18 fits 16.0–16.5 cm, size 19 fits 17.0–17.5 cm, size 20 fits 18.0–18.5 cm, size 21 fits 19.0–19.5 cm, size 22 fits 20.0–20.5 cm.
| Size | Circumference | Small | Medium | Classic |
|---|---|---|---|---|
| 15 | 15 cm / 5.9 in | ✓ | ✓ | ✓ |
| 16 | 16 cm / 6.3 in | ✓ | ✓ | ✓ |
| 17 | 17 cm / 6.7 in | ✓ | ✓ | ✓ |
| 18 | 18 cm / 7.1 in | ✓ | ✓ | ✓ |
| 19 | 19 cm / 7.5 in | ✓ | ✓ | ✓ |
| 20 | 20 cm / 7.9 in | — | ✓ | ✓ |
| 21 | 21 cm / 8.3 in | — | ✓ | ✓ |
| 22 | 22 cm / 8.7 in | — | ✓ | — |
Width reference: Small is 3.65 mm wide, Medium is 4.8 mm, Classic is 6.1 mm. Sizing is identical across widths—a size 17 in Small is the same inner measurement as a size 17 in Medium or Classic.
Sizes 17 through 19 account for the majority of secondary-market inventory across all three widths and, accordingly, the majority of counterfeit production. Size 15 is produced by Cartier but rarely surfaces in the secondary market; when sourcing a size 15, expect a longer wait and higher relative price. Size 22 is the newest size in the collection and exists only on the Medium width. If you are between two sizes, request a second opinion before purchasing. Cartier does not resize the Love Bracelet after the fact—a wrong size is a returned piece, not an altered one.
The Complete Visual Reference
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Three Widths, One Design Language
Since 1969 Cartier has expanded the Love Bracelet into three distinct widths—Small, Medium, and Classic—plus a flexible variant called LOVE Unlimited introduced in 2025. All three rigid widths share the same oval silhouette, the same ten screw-head motifs (five on each face), the same interior hallmarking, and the same Cartier signature. What differs is the width of the band, the size range Cartier produces, and the closure mechanism.
The Three Widths
Slimmest Profile
Roughly half the width of the Classic. Produced in five sizes—15 through 19 cm—and suited to smaller wrists or for stacking with other bracelets. The closure is a single captive working screw paired with a hinge that allows the bracelet to open like a clasp. Easier than the Classic to put on single-handedly. Available in yellow, rose, and white gold with various diamond configurations.
The Intermediate Width
Cartier's most recent addition to the rigid Love line, introduced in 2024. Sits proportionally between the Small and the Classic. Produced in the widest size range of any Love bracelet—eight sizes from 15 through 22 cm—which makes it the only variant where size 22 exists at all. Same single-screw-plus-hinge closure as the Small. Available in yellow, rose, and white gold, with plain, semi-paved, and fully paved diamond variations.
The Original Oval
The form Cipullo drew in 1969. Substantial on the wrist, with two working screws at the closure rather than the single-screw-plus-hinge used on the later widths. Produced in seven sizes, 15 through 21 cm. The Classic has never been produced in size 22. Available in yellow, rose, white, platinum, and tri-gold configurations, with plain, four-diamond, ten-diamond, and fully paved variations. The Classic is the piece most people picture when they hear "Cartier Love Bracelet," and it dominates the pre-owned market.
The three widths can be stacked together—a combination Cartier itself styles regularly—or worn alone. Sizing is consistent across widths: a size 17 in Small is physically the same interior measurement as a size 17 in Medium or Classic, so you can use one to size for another.
Closure Systems
The Classic model's two-screw closure has been produced in two different versions over the bracelet's history. The Small and Medium models use a different closure system entirely.
Screws Fully Detach
On the original Classic closure, both working screws unscrew completely and separate from the bracelet. One half of the oval comes fully away from the other to put the bracelet on. This is the design that created the partner-ritual romance of the Love Bracelet—a second person traditionally helps. The screws can be dropped or lost during opening. Earlier pre-owned Classic pieces will almost always use this system.
Captive Screws
The Classic's updated closure: the two working screws remain attached to the bracelet even when fully loosened, held in a small casing. Makes single-handed opening possible and eliminates the risk of losing a screw. From the outside the bracelet looks identical to the original system; the difference is visible only when the screws are loosened. All current-production Classic bracelets use this system.
Hinge Plus Single Screw
Both the Small and Medium widths use a single captive working screw paired with a hinge on the opposite side. The bracelet opens like a clasp rather than separating into two pieces. This is the simplest closure to operate alone and is what Cartier's sizing guidance assumes you are buying for a single-person daily-wear experience.
LOVE Unlimited
Released by Cartier in 2025, LOVE Unlimited is the newest chapter of the collection and the only flexible bracelet in the line. Rather than a rigid oval, it is built from linked articulated sections that move with the wrist. The screw motif remains, applied across the links, but the structure and authentication approach differ from the rigid bracelets. Multiple LOVE Unlimited pieces can also connect to each other for a longer stacked look. Still new enough in 2026 that secondary-market pricing and supply are not yet well-established. Authentication focuses on the link construction and the connection mechanism rather than the oval hinge and screws that define the classic.
For buyers approaching the secondary market, the practical takeaway is this: the Classic remains the most common, the most liquid, and usually the right first purchase. The Medium and Small give you options if you want something less substantial. LOVE Unlimited is a different category and pricing is still settling. Know which width and which closure system you are looking at before committing to a price.
Six Checks, In Order
Authenticators work through a predictable sequence when a Love Bracelet comes across the desk. The order matters because the first three checks catch the majority of counterfeits in under a minute, and two of them can be done at home with tools most people already have—a small magnet and a reliable nose. The last three exist to confirm what the first three have already implied. If you are buying pre-owned from a party who is not a Cartier-authorized dealer or an established authenticated reseller, run this sequence yourself, or insist the seller provide evidence against each of these six points.
Engraving Depth & Consistency
The interior of every authentic Love Bracelet is engraved with the Cartier signature, the metal purity number (750 for 18k gold, 950 for platinum), the size, and a unique serial. The engraving is laser-cut to uniform depth with even letter spacing in Cartier's proprietary font. Counterfeit engraving is typically shallower, slightly unevenly spaced, or shows faint tool chatter along letter edges under magnification. Generic fonts like Helvetica or Times New Roman on the interior are a definitive sign of a fake.
Screw Motif Precision
The classic Love Bracelet has ten screw-head motifs in total—five distributed across the front surface of the oval and five mirrored across the back. Separate from these, two working screws secure the closure on the Classic model; the Small and Medium models use a single working screw paired with a hinge. On an authentic piece, every one of the ten motif slots is milled to identical depth and width, and every motif has the same diameter. Counterfeits consistently fail here: slot centering is slightly off, slot depths vary across the ten positions, and the metal polish inside each slot is inconsistent. Checking all ten motifs—including the five on the inner surface that counterfeiters often neglect—is one of the fastest inspections a trained eye can perform.
Metal Authenticity
Every Love Bracelet is solid 18k gold (750) or platinum (950)—Cartier does not plate the Love. Two simple at-home tests catch most counterfeits. First, a magnet: authentic gold and platinum are non-magnetic, so any attraction to a household magnet is an immediate red flag. Second, the smell: after handling, fake Love Bracelets often carry a faint coppery or metallic odor from the base-metal core bleeding through worn plating. Authentic solid gold has no such smell. Visible discoloration, peeling, or unevenness of metal tone across the bracelet points to plating over a base metal.
Weight Within Range
A digital jewelry scale is the cheapest authentication tool available. Each size has a documented weight range for the classic 18k gold bracelet: size 17 sits around 30–32 grams, size 18 around 32–34, size 19 around 34–36. The small model is roughly half that weight at each size. A reading more than two grams outside the expected range for the size, width, and metal is cause for closer inspection—counterfeits almost always come in lighter because the gold has been adulterated with cheaper metals.
Screw Action & Hinge Quality
Working screws should turn cleanly and smoothly against the Cartier screwdriver. Any grinding, catching, or resistance—or the feeling that the screwdriver does not quite fit the slot—is a warning sign. On pieces with a hinge (the Small and Medium widths, and some LOVE Unlimited links), the hinge should close flush with no visible gap, no glue residue, and no step between the two halves. A visible seam at the closure is one of the fastest counterfeit tells.
Serial Format & Packaging
Cartier serials follow documented formats—typically six to eight characters combining letters and digits, engraved clearly but lightly on the interior. A serial that is too short, too long, or uses character combinations Cartier does not use is disqualifying on its own. Original packaging offers a secondary check: authentic Cartier boxes are a specific deep cardinal red with consistent padding made from batting rather than memory foam. Counterfeit boxes often read slightly orange or dull, and their mechanisms don't open cleanly. Packaging alone doesn't authenticate a bracelet, but wrong packaging is a warning.
Authentic vs. Counterfeit at a Glance
Most counterfeits fail not on a single dramatic flaw but on the accumulation of small ones. Below is the contrast that comes up most often in authentication inspections.
- Engraving crisp, even depth, consistent Cartier font
- All ten screw motif slots milled to identical depth
- Metal is solid 18k gold or 950 platinum, never plated
- Non-magnetic (gold and platinum do not attract a magnet)
- No coppery or metallic smell after handling
- Weight matches the documented range for size and width
- Working screws turn smoothly with Cartier screwdriver
- Serial follows Cartier's 6–8 character letter-digit format
- Cartier-issued box in deep cardinal red with batting padding
- Engraving shallow, uneven, or in a generic font
- Screw slots unevenly positioned, deep, or misaligned
- Plated over base metal—often brass or copper
- Attracts to a household magnet (the fastest fake test)
- Faint coppery smell after being worn on the skin
- Noticeably lighter than the documented weight
- Screws grind, resist, or require a non-Cartier tool
- Serial too short, too long, or in wrong character format
- Box color off (too orange or dull), memory foam padding
No single marker is determinative—a genuine Love Bracelet can have a worn or faded hallmark after decades of wear, and a sophisticated counterfeit can pass one or two checks. Authentication is cumulative. A piece that fails three or more of the six primary checks should be considered counterfeit until proven otherwise. A piece that passes all six, with original Cartier documentation, is effectively authenticated to the standard any specialist would accept.
Frequently Asked Questions
How do I know which Cartier Love Bracelet size I am?
Measure the circumference of your wrist with a flexible tape at its narrowest point, then add 1.5 to 2 centimeters for comfort. A 15.5 cm wrist typically wears a size 17; a 16.5 cm wrist wears a size 18. Cartier produces the Love Bracelet in three widths with different size ranges: the Small (3.65 mm) in sizes 15 through 19, the Medium (4.8 mm) in sizes 15 through 22, and the Classic (6.1 mm) in sizes 15 through 21. Size 15 is produced across all widths but rare in the secondary market. Size 22 is available only on the Medium. A size 17 in Small is the same interior measurement as a size 17 in Medium or Classic, so you can size one to size for another.
What are the most reliable authentication markers?
Six markers matter most: engraving depth and consistent Cartier font on the interior; perfectly uniform depth and alignment across all ten screw-head motifs (five on the front surface, five on the back); solid 18k gold or 950 platinum that does not attract a magnet and carries no coppery smell after handling; weight matching the documented range for the size and width; working screws that turn smoothly with the Cartier screwdriver; and a serial number in Cartier's proprietary 6–8 character format. Authentication is cumulative—a piece that fails three or more of these checks should be treated as counterfeit until proven otherwise.
Can a Cartier Love Bracelet be resized?
Cartier does not resize the Love Bracelet. Because the bracelet is manufactured as a single integral piece with precisely milled interior measurements, altering the circumference would compromise both structural integrity and authentication. If a size is off, the correct remedy is an exchange rather than a resize.
Do Cartier Love Bracelets have a serial number?
Yes. Every authentic Cartier Love Bracelet carries a serial number engraved on the inside, alongside the Cartier signature, the metal purity hallmark, and the size number. Serials typically run six to eight characters, combining letters and digits. A bracelet missing a serial, or with a serial that does not match Cartier's documented format, should be treated as suspect.
Is a pre-owned Cartier Love Bracelet a good investment?
The Cartier Love Bracelet has held its value unusually well for a fashion jewelry category. Well-kept examples in standard sizes routinely trade in the secondary market close to retail pricing, and rare older variants have appreciated. As with any investment, condition, provenance, and authentication are the drivers of value. An authenticated pre-owned piece from a reputable specialist is a legitimate alternative to buying new.
What is the difference between the original and new screw systems?
This applies only to the Classic model (6.1 mm). On the original Classic closure, both working screws unscrew completely and separate from the bracelet—one half of the oval fully detaches, which is why putting the bracelet on traditionally required a second person. On the new Classic closure, both working screws are held captive in a small casing and stay attached when fully loosened, eliminating the risk of losing a screw. Current Cartier production uses the new system; the exterior looks identical either way. The Small (3.65 mm) and Medium (4.8 mm) widths do not have an old-vs-new distinction—they were introduced with a single-screw-plus-hinge closure that has always worked the same way.
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