|Average Height||Smaller than the average Saiyan|
Arcosians are a race presumably belonging to the Planet trade organization, and are most notably responsible for supplying the Saiyans with Battle Armors and other technology. In return for this technology, the Saiyans would conquer planets for the Arcosians.
Their appearance has them wearing white cloaks and what resembles gas masks, as well as apparently being green.
The Arcosians are never seen nor mentioned again after the flashback they appear in (in episode "Goku's Ancestors").
It has been suggested by many fans that the Arcosians are actually Frieza's race.
This would be fitting given their relationship with the early Saiyans, as well as their small humanoid bodies concealed underneath their cloaks; as evidenced by Frieza's ancestor Chilled using a cloak when encountering Bardock on Planet Plant in Dragon Ball: Episode of Bardock. In addition, it is to be noted that the name of the race partially derives from negative temperatures (in this case, Arctic), like the names of the members of Frieza's race.