The Ba.88 was an all-metal, twin-engine, two-crew monoplane, with a high-mounted wing. It employed a "concentric" fuselage design, with a framework of steel tubes and a metallic skin covering which was both streamlined (having a very small fuselage cross-section) and strong. However, this internal load-bearing structure was very complex and of outdated design, as monocoque designs were starting to be developed elsewhere.