The Seiko SBSA003 is a perfect watch for sports enthusiasts and watch collectors. You can wear it during various sports activities like running, swimming (it's 100M water resistant), or just for daily use. The watch has an approximate case size of 42.5mm and a thickness of 13.4mm, which makes it a comfortable fit on your wrist. Its automatic movement with Caliber No 4R36 and 24 jewels ensures reliable performance.