Still enjoying my recently resuscitated late 1940s Mido Multifort bumper automatic. The case is 28 mm in diameter, and it is my tiniest watch. I have a large (7.5 inch circumference) wrist, and I prefer larger watches. This one came to me at an estate sale, and included original vinyl case, cardboard shell, and guarantee. I like it enough I will likely upgrade the cheesy strap that is on it. I have a particular 14mm expansion bracelet in mind.