314 Padded Stitched w Protective Flap Watch Strap a classic look for any watch. This Padded Stitched Watch Strap is genuine calfskin, which makes it super soft and comfortable to wear. This strap is ideal for people with sensitivities to metals as the protective flap is positioned under the buckle thus preventing the buckle from contacting the skin. Select the size that best suits your watch. Lug/Buckle Measurement: 12mm/10mm, 18mm/16mm.