Omega Speedmaster Chronoscope 43mm Mens Z016119 Black 21mm – 16mm Watch Strap
The top side isblack and the underside isred. Your watch strap is 21mm wide where it connects to your watch and is 16mm wide where it connects to your buckle. Your longer strap piece is 11.5cm long and your shorter strap piece is 7.5cm long.