346 Flat Calf Leather Watch Strap a leather Alpine watch band with lizard grain. The 346 leather watch bands are available in black, tan, raspberry red, blue, green, pink, yellow, as well as purple and is available in a variety of sizes. Select the size and colour that best suits your watch. Lug/Buckle Measurements: 12mm/12mm, 14mm/14mm, 16mm/16mm, 18mm/18mm & 20mm/20mm.