Iéna had an overall length of 122.31 metres (401 ft 3 in), a beam of 20.81 metres (68 ft 3 in)[2] and, at deep load, a draught of 7.45 metres (24 ft 5 in) forward and 8.45 metres (27 ft 9 in) aft. She displaced 11,688 tonnes (11,503 long tons) at normal and 12,105 tonnes (11,914 long tons) at deep load.[3] As a flagship, Iéna had a crew of 48 officers and 731 ratings; as a private ship, her crew numbered 33 officers and 668 ratings.[4] The ship was fitted with large bilge keels, but, according to naval historian N.J.M. Campbell, was reported to roll considerably and pitch heavily,[5] although this is contradicted by Captain (Capitaine de vaisseau) Bouxin's report of November 1905: "From the sea-keeping point of view the Iéna is an excellent ship. Pitching and rolling movements are gentle and the ship rides the waves well."[6] Naval historians John Jordan and Philippe Caresse believe the ship was a good gun platform because she had a long, slow roll and she manoeuvred well.[7]