Seeds of the plant Mung Bean (<i>Vigna radiata</i>). Size of seed in this picture is about 3 mm x 4.5 mm.
<a href="//commons.wikimedia.org/wiki/User:Sanjay_ach" title="User:Sanjay ach">Sanjay Acharya</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>