This Seiko SBDC123 watch is great for diving enthusiasts and watch collectors. When you're out on a diving adventure, its 200m water resistance will keep it safe underwater. The watch also looks stylish enough for everyday wear. It's suitable for those who appreciate fine mechanical watches. The case is 42.7mm horizontally, 46.6mm vertically, and 13.2mm thick, making it a medium - sized watch that fits well on most wrists.