From the info I gathered, it's 39mm and 8mm thick. There are two models that look similar. The 5476 (which is this one), and the 5576 which is 42mm. I'm getting such a great deal on this model so I figure why not pull the triger. It's a quartz movement which is nice in a dress watch. I know I won't be wearing it alot so I don't have to worry about setting the time everytime I want to throw it on.