This watch case measures 50mm across, and 14mm deep. The outer dial does turn if you want to set a bearing. The buttons are not labeled so you need to memorize what they do. This watch is truly amazing in its functionality and the ways you can customize it. It is challenging to hold the watch level enough for the compass to work properly. I also recommend the
Suunto Lumi, which has the same functionality minus the adjustable compass dial, because it comes with a mini screwdriver to remove the band and put the watch on a neck-cord. I decided not to keep this watch because it\'s not sized for a woman\'s wrist. I would certainly recommend it to a man that wants these features.