To discover if a silver bracelet is the right size for you, take a piece of string or paper and cut it to the size of the bracelet, then place it around your wrist. It should be firm enough that it doesn’t fall off, but allow for 1-2 fingers to slip beneath it.
To find your size for a slip-on bangle without an opening, you will need to place your thumb and forefinger together and measure the widest part of your hand, then compare this to the internal diameter measurement of the bangle.