Cuff watch has black jewel covering the watch dial. Pulling the jewel part of the watch to the side exposes the dial and also allows you to put on the cuff watch. The jewel is oval and is 1/2 inch wide and 3/4 inch in length. The round watch face is 3/4 inch across. The watch is 8 inches in circumference. Watch cuffs are 3/16 inch wide. When you wear the watch, no one knows because it looks like you are wearing jewelry.