The Seiko Save the Ocean SBDJ045 Series Diving Watch is perfect for divers and ocean lovers. It can be used during air diving thanks to its 200m water resistance. The watch is solar - powered, which is great for those who are environmentally conscious. With an approximate case diameter of 45.9mm and thickness of 12.1mm, it has a comfortable and wearable size. Whether you're a professional diver or just someone who loves the ocean, this watch is a great choice.