Yes, all maps are hard mounted. Yes, the base box is the same size as Crows (20 x 25 x 7 cm) or (8 x 10 x 2.5"). The maps are 2.5ish mm thick that makes all the boards (4 in base game, 1 in Atlantikwall, 4 in Neptune and 2 in Normandy) 27.5mm of boards. Then 16mm dice that's 43 mm. We still have 33 mm to spare for all the rest.