Her design was heavily informed by the restrictions of the Treaty of Versailles and the dictates of the Allied disarmament commission. Displacement was capped at 6,000 long tons (6,100 t), though like all German warships built in the period, Emden exceeded the size limitations. She was armed with a main battery of surplus 15 cm (5.9 in) guns left over from World War I, mounted in single gun turrets, as mandated by the Allied powers.