 The armies are usually played in 15mm or 25mm scale, though 6mm and 54mm are used.Ground scale is in paces, and the number of inches to a pace varies according to the figure scale - 1" to 50 paces in 15mm, 40mm to 50 paces in 25mm.The frontage width of one stand of troops, called an element, is standardised for all troop types, the depth and number of troop models on it varies by formation type (skirmishers - or "psiloi" in DBM terminology - have 2 men per base, cavalry 3, heavy infantry 4 etc.)