A goal of minimum cost was pursued very strongly by the mirror project team. The team has concluded that a more compact and cost-effective end cell magnet system could be achieved by employing octopole magnets. Feasibility of an octopole end cell magnet design was studied as part of FY84 Fusion Power Demonstration (FPD) work under the direction of Lawrence Livermore National Laboratory (LLNL). This paper describes sizing and design studies of a superconducting octopole magnet. Magnetic field requirements were supplied by LLNL for the end cell region. Based on these requirements, the Fusion Engineering Design Center (FEDC) synthesized an end cell magnet system. The final end cell magnet system at the conclusion of the FPD study consisted of a 24-T choke coil, a small octopole, a large octopole, and a mirror circular coil. Many octopole magnet configurations were studied, but the final large octopole design consisted of four saddle coils. The saddle-shaped coils were preferred over other shapes for ease of fabrication. This paper describes the scoping design study of the saddle coil winding and its support structure. The support concept for interconnecting the four saddle coils (to form the octopole) is described. An octopole consisting of saddle coils can be fabricated using current conductors and coil winding technology.