The Kelly bag is the oldest and most classic Hermès bag. The Kelly bag is known as the sister of the Birkin bag. Its original name is "Sac-à-Dépêches" (Sac-à-Dépêches). It is the favorite bag of former actress and queen Princess Grace Kelly of Monaco. Kelly once used this handbag to cover her slightly bulging belly due to pregnancy in front of media cameras. It immediately became a hot topic and the brand renamed it "Kelly bag" in 1977. There are two styles of Kelly bags, namely Sellier and Retourne. The difference between the two lies in the stitching and edge design - Sellier's stitching is exposed and the edges are prominent, while Retourne's stitching is inward and the outline is soft. The former is made of hard leather and has a strong structure, while the latter is made of soft leather and looks more casual and natural, and has a larger capacity than Sellier. Kelly bags are available in a wide range of sizes, including small 15 or 20 cm, medium 35 cm, and large 50 cm. Hermès handbag collectors have long been arguing over whether the Kelly bag or the Birkin bag is more practical; but what is certain is that if you want a classic Hermès bag, the Kelly bag is the first choice.