Swiss Concept's Series 5 Collection features the Nautical Classic, Nautical Luxury, Nautical Sport, Royal Classic, Royal Sport, Racing Pro, Racing Classic, Racing Elegance and Racing Special Editions. Each model is hand-assembled in either PVD-coated matte black, 316L stainless steel, 18 karat plated rose gold, 18 karat plated yellow gold or a series of striking two-tone combinations, all inspired by the finest high-end watches at the pinnacle of the Swiss watchmaking industry. All Series 5 Apple Watch Cases will fit the Apple Watch Series 5 with a case size of 44mm.