xiǎo
small
Depicts three small dots, representing the meaning "small". Originally the same character as 少. The small dots possibly represent grains of sand (沙).
Evolution

Oracle script
(~1250-1000 BC)
Bronze script
Early Western Zhou (~1000 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Regular script
ModernDefinitions
Component uses
Sources
季旭昇《說文新證》p.79