Seen here in reference IW387901 with a steel case and a black dial the new Spitfire Chronograph is 41mm wide 15.3mm thick
link and 51.5mm lug to lug. Powered by an IWC-made automatic chronograph movement the Spitfire Chrono has a screw-down crown a domed and anti-reflective sapphire crystal 20mm lugs and water resistance to 6 bar 60m192ft. This reference comes on an excellent green textile strap but the design is so versatile that
link it would likely work on any strap you throw at
link it.