コリエ・ド・シアン

The Collier de Chien (literally "dog collar" in French, abbreviated CDC) is one of Hermès' signature bracelets. Its defining feature is a row of four-sided pyramid studs (Medor studs) centered on a spinning O-ring. The best-known form pairs a leather band with substantial metal hardware, worn as a wide cuff (manchette) that boldly frames the wrist. Combining elegance with a hard edge, the design has remained popular since its debut, and beyond the leather version it later expanded into sterling silver and solid-gold jewelry versions.

Its roots are said to lie in dog collars Hermès produced in the early 20th century. The studded, ringed design made for hunting dogs was later adapted into a belt worn at the waist. At the request of couturière Marie Gerber it was reworked into a women's belt, and the Collier de Chien belt is generally said to have appeared around 1927. The bracelet (cuff) adaptation is usually placed in the 1940s, with sources variously citing around 1940 or a 1949 collection, so a single precise date cannot be stated with certainty. In any case, the lineage of dog collar → belt → bracelet underpins this motif.

The core of the design is the row of pyramid studs on a central plate and, at its center, an O-ring that genuinely spins. Though it looks solid, the ring rotates freely and is regarded as the hallmark of the CDC. Leather versions use a push-lock/buckle closure with a prong and multiple holes on the inside, so the multiple holes allow fine adjustment of fit. Hardware is most often palladium (silver-toned), gold, or rose-gold plated, with rarer finishes such as black PVC, guilloché, and permabrass also reported to exist.

The current leather CDC is generally offered in sizes T1, T2, and T3, whereas the older naming used PM and GM. According to sales associates, the old PM corresponds roughly to today's T1–T2; T1 suits slimmer wrists and a closer fit, T2 fits slightly larger wrists or those preferring more room, and T3 is roomier, with men typically taking the T3 (the equivalent of the old GM). The width is that of a medium cuff, prized for the volume with which it covers the wrist. Figures vary by piece and era, so the correspondences given here are only a guide.

Leather versions use Hermès' staple leathers such as Swift (a supple calfskin with rich color) and Epsom (an embossed, scratch-resistant leather with crisp structure). Color choices range widely from black, red, and white tones to vivid, saturated hues, varying by season and era. Hardware is mainly palladium-, gold-, or rose-gold-plated. As leather-free jewelry versions, there are sterling silver (925) and solid-gold pieces, as well as luxurious variants set with diamonds. Much of the appeal lies in how the pairing of leather and hardware changes the overall impression.

Hermès leather goods commonly carry a blind stamp (an embossed mark) indicating the era, and leather CDC versions, too, often show stamps on the hardware or inside the leather. The system of letters and symbols denoting the year of manufacture has changed over time, and its shape and placement also differ by era, so it is hard to determine the era or everything from the stamp alone. The hardware side may bear an "HERMÈS" mark along with material or origin stamps. It is wisest to treat stamp-reading as general guidance only and to avoid definitive conclusions.

Things to check include whether the O-ring spins smoothly, whether the pyramid studs have sharp, even ridges, the degree of plating wear, flaking, or discoloration, corner abrasion, color transfer, dryness or warping of the leather, and damage around the prong and holes. The precision of the stamping and the feel of the hardware can also be clues. That said, the points described here are only general guides for checking state and condition and do not guarantee authenticity. Leave the final judgment of authenticity or condition to a trusted expert (this site does not perform authentication).

The leather CDC ranges from a relatively accessible price band up to high-priced silver, solid-gold, and diamond-set pieces. Secondhand prices vary greatly with material (leather vs. precious metal), hardware finish, size, color, condition, and whether accessories are included. Rare colors or pieces in fine condition can command a premium, but any sense of market value mentioned here is an estimate only and does not guarantee actual transaction prices. Rather than treating it as an investment, choosing based on whether the size fits your wrist and whether you like the color and hardware tends to bring the most satisfaction.

The wide cuff gives the wrist a strong presence and works as an accent or focal point in simple outfits. It can be layered with other Hermès leather bracelets, scarves, or a watch. Matching the hardware tone (silver, gold, or rose gold) to your other accessories or watch creates a cohesive look. Its unisex versatility for both men and women is part of the appeal, making it a flexible piece that can lean either edgy or elegant.

For leather versions, avoid water, direct sunlight, and heat/humidity, and gently wipe away sweat and oils with a soft dry cloth. Rubbing the plated hardware hard can cause wear and discoloration, so handle it gently with a dedicated cloth. When not in use, store it in the provided dust bag or box, kept apart to avoid color transfer between leathers. Richly colored leathers like Swift are prone to color transfer and scuffing, so take care. For concerning damage or dryness, it is reassuring to consult professional maintenance such as Hermès' after-sales service (the "spa").

The name "Collier de Chien" literally means "dog collar," preserving in its very name its origin as a collar made to elegantly protect hunting dogs. Some view the central ring as deriving from the loop through which a leash was once passed. Loved over the years as it shifted form among belt, bracelet, and jewelry, its completeness—recognizable as "Hermès' CDC" from the minimal icons of pyramid studs and an O-ring alone—continues to draw collectors.