The Victorinox Classic SD Swiss Army knife is by far the most popular Victorinox knife (about half of the Swiss Army knives left behind in airports are Classic SD models). The Classic SD is extremely compact and convienent, with five useful tools in a "keychain" size knife that is smaller than your pinkie finger. It deserves its popularity.

This model comes in eight solid colors, four translucent colors, and several specialty designs, which are listed below.

The Classic SD knife also comes in many retired colors and designs.