Japanese Miyuki Mini-Drops or fringe beads are very small teardrops, with a centered hole.

These are similar to the Czech 4x6 tiny teardrops (which are larger, but same shape),
and, Japanese Magatamas (which have off-centered holes and are slightly squarish), 
but these mini fringe drops are either 2.8mm or 3.4mm, and are roundish, and have a centered holed.

Sold in 28-30 gram 6" tubes.
There are approximately 560 3.4mm mini fringe drops in a 6" tube.
There are approximately 905 2.8mm mini fringe drops in a 6" tube.