336 Stitched Calf Skin Watch Strap a classic look for any watch. Genuine calf skin watch bands are soft and comfortable to wear. The black watch strap has black stitching, and the brown calf skin watch strap has brown stitching. Select the size and colour that best suits your watch. Lug/Buckle Measurements: 26mm/24mm, 28mm/26mm, 30mm/28mm.