If you are stringing beads on beading wire, you need crimp beads!
For wire .015 Inch or smaller beading wire (such as Soft Touch, Soft Flex, Acculon, Accuflex, Beadalon) you may prefer MICRO crimp beads!
Use Micro Crimper pliers, and your micro crimp bead will be easier to fit inside other beads. This is because most standard silver or goldfilled crimp beads are 2mm wide.