This pair is usable as a pendant top and parts or earring and pias parts, since there is 2 hole at top and bottom area for each. Size is 8.73mmx20mmx5.91mm for each. the holes are about 1mm(diameter). Please check another version, which has 1 holes at top, to connect each or other parts for your own jewelry. The volume is approx 107 cubic millimeters for each. It would be about 1.07g for staring siliver (for each).
Another version's product name: twist pair parts 1 hole