The Hermès Birkin: a complete guide to handbag sizes

There are few handbags as coveted as the Hermès Birkin. Since its inception nearly four decades ago, the Birkin has become renowned not only because of its exclusivity but also because of its evolution. It has remained an iconic silhouette while continuing to reflect changing tastes in fashion, collecting and craftsmanship.

From the generously proportioned originals of the 1980s to today’s coveted miniatures, the French fashion house has introduced Birkin bags in a variety of sizes. Here we explore every size, from the classics to the ultra-rare, and how to select the perfect one for your needs.

Birkin 40: the travel pro

Originally one of only two available sizes, the Birkin 40 is statistically quite rare. Generally considered a men’s bag, it has long been associated with travel. Today, it’s produced in very limited quantities and lost some traction after miniatures dominated fashion trends. However, as the pendulum swings back, demand is returning, and collectors are rediscovering the elegance of larger Birkins that offer more functionality.

Birkin 35: the original favourite

The original Birkin was born from a conversation between Jane Birkin and then-Hermès CEO Jean-Louis Dumas in which the film star lamented that she couldn’t find a large enough luxury bag. While sitting next to one another by chance on a flight, Dumas produced a sketch and the bag was released commercially in 1985.

The design reflected the need for space, debuting exclusively in 40 cm and 35 cm sizes. ‘Looking at the market across decades, the Birkin 35 is the primary bag you see most,’ says Max Brownawell, Vice President, Handbags & Accessories at Christie’s. ‘A lot of people do use it daily, but it’s also seen as more of a travel bag.’

Birkin 30: the Goldilocks size

If one Birkin best captures today’s collecting preferences, it’s the Birkin 30. ‘This is the ideal Goldilocks size these days,’ says Brownawell. ‘It’s small enough to be diminutive and ladylike, but also big enough to hold anything you’d want to carry.’

Introduced by Dumas in the 1990s as an expansion of the original Birkin line, this size was intended to offer a more everyday option. While Birkin 35s continue to be a mainstay of the market, other sizes like the Birkin 30 are beginning to gain popularity, with collectors increasingly viewing it as a cornerstone of the modern Hermès collection.

Birkin 25: the contemporary classic

In 2004, when Jean-Paul Gaultier took over as the house’s creative director, he introduced an even wider range of sizes, including the Birkin 25. ‘Most buyers would think of this size as an evening or event bag,’ says Brownawell, ‘but there’s also plenty of people who use it as their daily driver.’

As compact luxury gained momentum, this size transformed perceptions of the classic handbag. It preserves the unmistakable proportions of the Birkin silhouette while offering a modern twist.

Birkin 20: the modern collector’s trophy

The Birkin 20 represents the latest chapter in the bag’s continuous evolution. Designed as an elegant miniature rather than an everyday carryall, this size is just large enough for essentials such as a phone and wallet.

The construction is also a distinguishing feature. Most Birkins are produced using the Retourné structure, in which a bag is stitched inside out so that the seams are hidden and a soft piping is created around the edges. The Birkin 20, however, uses Sellier construction, with the stitching on the outside, resulting in a stiffer bag like the Hermès Kelly.

Demand for the Birkin 20 has reached unprecedented levels in recent years, with a Faubourg Birkin 20 setting an auction record for the model after realising €635,000 in June 2026. ‘It’s really the pinnacle of collecting right now,’ says Brownawell. ‘And, depending on the colourway, it’s one of the rarest bags out there.’

The rare and rarest

For dedicated Birkin collectors, there are several other designs that fall outside the traditional size spectrum. The Birkin 15, for example, is a miniature objet d’art the size of a wallet. Introduced during Gaultier’s final years at Hermès, it was ultimately discontinued, making surviving examples exceptionally collectible.

On the other end of the spectrum is the Birkin 50, the largest Birkin produced by Hermès. While the French fashion house does still produce the size, it is made in extremely limited quantities and therefore very rarely seen.

Equally intriguing are the various reinterpretations of the Birkin itself. The Shoulder Birkin, also introduced by Gaultier, reimagined the classic silhouette with elongated handles and was originally offered in a 42 cm size. There is also the Shoulder Birkin Light, which is produced in 29 cm and 39 cm sizes.

Other elusive creations — including the Birkin Dépêches briefcase, long-handle Birkins and the rarely seen Birkin Slim — demonstrate Hermès' willingness to reinterpret one of its most iconic designs while preserving its unmistakable identity.

Fashions may change and certain styles will rise and fall from prominence, but the Birkin has proven that it will always remain a cornerstone of luxury.