What is the unit size used in EPT?
It differs from nation to nation.
Tsolyánu's legions are twenty 400-man cohorts, with each figure representing 100 actual figures.
Yan Kor's organization is completely different, but once again 1 figure represents 100 actual figures. They are organized in Gureks.
The following is taken from Eureka's excellent web site.
"The Guréks of Tléku Miriyá
Whereas the Tsolyáni organize their forces into legions of a specific size and type, such as heavy infantry or crossbowmen, the Yán Koryáni use much larger, composite formations known as Guréks. This is partly because the Yán Koryáni forces are raised by individual cities or powerful clans. Each Gurék contains a variety of troop types, of varying strengths, depending upon the city or clan that raised it.
Lord Zhú Kriyór, clan leader of Tléku Miriyá has raised two Guréks for the Baron's cause. The crossbowmen of this city are famed for their accuracy.
The first Gurék consists of 5000 heavy infantry with long spears, swords and shields; 3000 medium infantry with throwing spears, swords and shields; 2500 crossbowmen with medium crossbows, swords and large pavise shields; and 1000 artillerymen who serve 125 onagers.
The second Gurék is made up of 5000 medium infantry armed with pikes, short swords and shields; 4000 crossbowmen with medium crossbows, swords and large pavise shields; and 12000 light infantry with slings and bows."
I take it the third nation is Mu'ugalavyá. They are organized in Legions, and once again, 1 figures equals 100 men, but you really need someone to reply that has the Armies of Tékumel books.