Does anyone know the exact size of the buttons on our SD. blues? I'm trying to order chrome plated ones for my uniform, but there are like 10 different choices for the sizes. I would like to know for the 4 big ones on the midline of our torsos and the small ones on our pockets. I'm a male, if that makes a difference to the sizes of the buttons because I'm unfamiliar with female attire. Thanks in advance.