I had to return this watch, as it was larger than advertised (definitely thicker than 7 mm). This is the same as the Oniss 0N601-L, apparently--at least that was the watch that was sent to me. It is very large and thick and heavy. I also read a review of another Oniss ceramic watch that said that it shattered when dropped on the floor...
so, buyer beware. The company was nice about sending me a return shipping label.