The Birkin 25, the tiniest standard Hermès Birkin bag, stands unique with its dimensions of 10” W x 8” H x 5” D and a 4” handle drop, barring a few exceptionally rare limited edition sizes. This small yet capable bag can be comfortably held in hand or on the forearm, accommodating all essential items like a wallet, keys, phone, lipstick, and even a compact book or notebook.

One step up in size is the Birkin 30. It spans 11.5” W x 9” H x 6” D with a handle drop of 4 inches. This bag offers the convenience of carrying it in hand or on the forearm. It's spaciously designed to fit all your necessities such as keys, wallet, a phone, a small makeup bag, and a petite book or notepad.

With a medium size, the Birkin 35 is another popular Hermès Birkin bag. This spacious trapeze-shaped bag measures 14” W x 10” H x 7” D and sports a 4” handle drop. This bag can be held by hand or on the forearm, and its roomy interior can comfortably house items like a small water bottle, keys, wallet, phone, makeup bag, and a book.

Another medium-sized entry in the Hermès Birkin range is the Birkin 40. It measures 16” W x 12” H x 8” D with a 4.5” handle drop. This generously sized bag can be carried on the forearm or by hand, and it's ample enough to accommodate a water bottle, book, small laptop, makeup bag, phone, wallet, and keys.

The brainchild of Jean-Paul Gaultier in 2005, the Birkin 42 was conceived for those desiring a shoulder-carried Hermès Birkin. It measures 16.5” W x 9.5” H x 7” D and can be worn on your shoulder, forearm, or carried by hand. Though longer and shorter than standard Birkins, the Birkin 42 can still fit all your essentials, from a small book to makeup, keys, wallet, and phone.

The larger Birkin 45 (not shown above) extends to 17.7” W x 12.2” H x 17.7” W with a 4.7” handle drop. The Birkin 45 doubles as a weekender bag and can be hand-held or carried on the arm. It's spacious enough to easily fit clothing for a weekend, plus a small vanity case.

The Birkin 50 stands as the biggest member of the Hermès Birkins family. The pictured HAC (Haut à Courroies “High Belts”) Birkin 50, originally designed in the 1800s as an equestrian bag, is slightly taller than a standard Birkin bag and features a longer handle drop. Its dimensions are 19” W x 17” H x 10.5” with a 5” handle drop, and it can be held by hand or on the forearm. Perfectly suited as a weekender bag, it can easily accommodate a weekend’s worth of clothing, a toiletry case, and any additional items required for a short trip.