This beads are shaken front to back in a rhythmic pattern. The bigger the bead shows the lady has a rich moran/husband thus more command.
<a href="//commons.wikimedia.org/w/index.php?title=User:Joe_KimaniT&amp;action=edit&amp;redlink=1" class="new" title="User:Joe KimaniT (page does not exist)">Joseph KimaniT</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>